The "despicable" attacks on police horses have caused people to turn on those protesting in the Million Mask March, if reaction on Twitter is anything to go by.
Six of the Metropolitan Police's horses were injured the demonstration in London on Thursday night, in which 50 people were arrested and three police officers were injured.
But the attacks on the animals were what really upset people.
People responded saying those who had injured the horses were "not fit to members of the human race" and people implored police to catch the "idiots" responsible.
The horses were injured in The Mall, Great George Street, Parliament Square and Trafalgar Square.
Embassy - one of the force's oldest horses - was startled and bolted after being targeted with a firework. The officer riding was thrown from his horse and taken to hospital with a broken wrist.
Story continues beneath slideshow
Million Mask March London
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An anti-capitalist protester wearing a Guy Fawkes mask holds a placard as he stands alongside a burning police car during the 'Million Masks March', organised by the group Anonymous, in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
Million Mask March Demonstration Takes Place In London(02 of34)
LONDON, ENGLAND - NOVEMBER 05: Masked protesters walk towards Buckingham Palace during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(03 of34)
LONDON, ENGLAND - NOVEMBER 05: Masked protesters are stopped by a police line during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(04 of34)
LONDON, ENGLAND - NOVEMBER 05: Masked protesters pass in front of the Houses of Parliament during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
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Anti-capitalist protesters wearing Guy Fawkes masks hold placards at the start of the 'Million Masks March', organised by the group Anonymous, at Trafalgar Square in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
Million Mask March Demonstration Takes Place In London(06 of34)
LONDON, ENGLAND - NOVEMBER 05: A masked protester climbs a lamp post in Trafalgar Square during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(07 of34)
LONDON, ENGLAND - NOVEMBER 05: A masked protester climbs a traffic light in Parliament Square during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(08 of34)
LONDON, ENGLAND - NOVEMBER 05: Masked protesters are stopped by a police line during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
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Anti-capitalist protesters wearing Guy Fawkes masks hold a flare during the 'Million Masks March', organised by the group Anonymous, in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
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Anti-capitalist protesters wearing Guy Fawkes masks embrace in front of a line of British police officers during the 'Million Masks March', organised by the group Anonymous, near the Houses of Parliament in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
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An anti-capitalist protester wearing a Guy Fawkes mask stands on a traffic light during the 'Million Masks March', organised by the group Anonymous, near the London Eye in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
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British police officers on horesback stand guard outside Buckingham Palace as anti-capitalist protesters wearing Guy Fawkes masks take part in the 'Million Masks March', organised by the group Anonymous, in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
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An anti-capitalist protester wearing aGuy Fawkes mask holds a lit flare during the 'Million Masks March', organised by the group Anonymous, near the Houses of Parliament in central London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
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Anti-capitalist protesters wearing Guy Fawkes masks clash with British police during the 'Million Masks March', organised by the group Anonymous, near the Houses of Parliament in central London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
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An anti-capitalist protester wearing a Guy Fawkes mask stands in front of a line of British police officers during the 'Million Masks March', organised by the group Anonymous, near the Houses of Parliamnet in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
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An anti-capitalist protester wearing a Guy Fawkes mask holds placards as he stands alongside adamaged British police car during the 'Million Masks March', organised by the group Anonymous, in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
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An anti-capitalist protesters wearing a Guy Fawkes mask carries a traffic cone during the 'Million Masks March' protest march, organised by the group Anonymous, as it passes Parliament Square in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
BRITAIN-POLITICS-PROTEST(18 of34)
Anti-capitalist protesters wearing Guy Fawkes masks clash with British police officers during the 'Million Masks March', organised by the group Anonymous, near the Houses of Parliament in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
BRITAIN-POLITICS-PROTEST(19 of34)
Anti-capitalist protesters wearing Guy Fawkes masks clash with British police officers during the 'Million Masks March', organised by the group Anonymous, near the Houses of Parliament in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
Million Mask March Demonstration Takes Place In London(20 of34)
LONDON, ENGLAND - NOVEMBER 05: Masked protesters stand in front of the Houses of Parliament during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(21 of34)
LONDON, ENGLAND - NOVEMBER 05: A masked protester sits in front of the Houses of Parliament during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(22 of34)
LONDON, ENGLAND - NOVEMBER 05: Masked protesters are stopped by a police line during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(23 of34)
LONDON, ENGLAND - NOVEMBER 05: A masked protester holds up a flare during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(24 of34)
LONDON, ENGLAND - NOVEMBER 05: A masked protester wears a traffic cone on their head during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(25 of34)
LONDON, ENGLAND - NOVEMBER 05: Masked protesters take a selfie in front of the Houses of Parliament during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(26 of34)
LONDON, ENGLAND - NOVEMBER 05: A masked protester argues with police during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Million Mask March Demonstration Takes Place In London(27 of34)
LONDON, ENGLAND - NOVEMBER 05: A police officer speks with masked protesters during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
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Anti-capitalist protesters wearing Guy Fawkes masks hold placards as they congregate in Trafalgar square ahead of the 'Million Masks March', organised by the group Anonymous, in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
Million Mask March Demonstration Takes Place In London(29 of34)
LONDON, ENGLAND - NOVEMBER 05: Masked protesters turns to look at the camera during the Million Mask March in Trafalgar Square on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
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Anti-capitalist protesters wearing Guy Fawkes masks hold placards as they gather at Trafalgar Square ahead of the 'Million Masks March', organised by the group Anonymous, in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
Million Mask March Demonstration Takes Place In London(31 of34)
LONDON, ENGLAND - NOVEMBER 05: Masked protesters pose in front of the Houses of Parliament during the Million Mask March on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
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Anti-capitalist protesters wearing Guy Fawkes masks hold placards as they congregate in Trafalgar square ahead of the 'Million Masks March', organised by the group Anonymous, in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
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Anti-capitalist protesters wearing Guy Fawkes masks hold placards as they congregate in Trafalgar square ahead of the 'Million Masks March', organised by the group Anonymous, in London on November 5, 2015. The protest was held on the night of Britain's Guy Fawkes Night, and many of the marchers wore the white masks of the man who plotted to blow up parliament in 1605, now associated with Anonymous. AFP PHOTO / JACK TAYLOR (Photo credit should read JACK TAYLOR/AFP/Getty Images) (credit:JACK TAYLOR via Getty Images)
Million Mask March Demonstration Takes Place In London(34 of34)
LONDON, ENGLAND - NOVEMBER 05: Masked protesters hold up signs as they stand on a lamp post during the Million Mask March in Trafalgar Square on November 5, 2015 in London, England. The annual anti-establishment protest is organised by activist group Anonymous and is one of hundreds expected to take place in cities across the globe this evening. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)
Quartz suffered a hind leg injury, believed to be caused by glass, Qwerty sustained an injury to his hind quarters, Heather suffered a cut to her fetlock on her hind leg, Illustrious suffered an injury to his eye, believed to be caused by a stick and Quixote sustained injuries to his front legs.
The force released photos of the horses recuperating in the stables.
Metropolitan Police Commissioner Sir Bernard Hogan-Howe said the violence during the protest was "despicable". He was speaking in the stables at Great Scotland Yard, while petting the horse that was injured.
He said: "The horses were big enough to see, they knew what they were doing. They knew it was a possibility these fireworks would frighten the animals, so I think it's pretty despicable behaviour.
"They have no right to hurt other people, they have no right to hurt animals, and they have no right to frighten the members of public that are wandering around.
"Protest by all means but don't hurt other people in the process."
Million Mask March Injured horses
(01 of10)
PC Clare Rees stands beside police horse named 'Quixote' at the Metropolitan Police horse stables in Great Scotland Yard, London, after they were involved in the violence at yesterday's Million Mask March which saw four police officers injured and several horses targeted. (credit:Jonathan Brady/PA Wire)
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PC Clare Rees stands beside police horse named 'Quixote' at the Metropolitan Police horse stables in Great Scotland Yard, London, after they were involved in the violence at yesterday's Million Mask March which saw four police officers injured and several horses targeted. (credit:Jonathan Brady/PA Wire)
(03 of10)
Metropolitan Police Commissioner Sir Bernard Hogan-Howe, offers some mints to a police horse named Embassy at the Metropolitan Police horse stables in Great Scotland Yard, London, following the violence at yesterday's Million Mask March which saw four police officers injured and several horses targeted. (credit:Jonathan Brady/PA Wire)
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PC Clare Rees at the Metropolitan Police horse stables in Great Scotland Yard, London, following the violence at yesterday's Million Mask March which saw four police officers injured and several horses targeted. (credit:Jonathan Brady/PA Wire)
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Metropolitan Police Commissioner Sir Bernard Hogan-Howe speaks at the Metropolitan Police horse stables in Great Scotland Yard, London, following the violence at yesterday's Million Mask March which saw four police officers injured and several horses targeted. (credit:Jonathan Brady/PA Wire)
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PC Clare Rees stands beside police horse named 'Quixote' at the Metropolitan Police horse stables in Great Scotland Yard, London, after they were involved in the violence at yesterday's Million Mask March which saw four police officers injured and several horses targeted. (credit:Jonathan Brady/PA Wire)
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Metropolitan Police Commissioner Sir Bernard Hogan-Howe, pets a police horse named Embassy at the Metropolitan Police horse stables in Great Scotland Yard, London, following the violence at yesterday's Million Mask March which saw four police officers injured and several horses targeted. (credit:Jonathan Brady/PA Wire)
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PC Clare Rees stands beside police horse named 'Quixote' at the Metropolitan Police horse stables in Great Scotland Yard, London, after they were involved in the violence at yesterday's Million Mask March which saw four police officers injured and several horses targeted. (credit:Jonathan Brady/PA Wire)
(09 of10)
Metropolitan Police Commissioner Sir Bernard Hogan-Howe, pets a police horse named Embassy at the Metropolitan Police horse stables in Great Scotland Yard, London, following the violence at yesterday's Million Mask March which saw four police officers injured and several horses targeted. (credit:Jonathan Brady/PA Wire)
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Metropolitan Police Commissioner Sir Bernard Hogan-Howe, stands next to a police horse named Embassy at the Metropolitan Police horse stables in Great Scotland Yard, London, following the violence at yesterday's Million Mask March which saw four police officers injured and several horses targeted. (credit:Jonathan Brady/PA Wire)