Thirty people have been rescued after the tour boat they were on caught fire on the Thames.
Families with children reportedly had to leap into the Thames after one of London's famous Duck Tour boats burst into flames opposite the Houses of Parliament.
Pictures posted by onlookers on social media sites showed how stricken passengers were hauled to safety by crews on passing tour barges after the fire broke out shortly before midday on Sunday.
The Spectator's contributing editor Harry Cole took to Twitter to describe his view of the "flaming vessel of doom."
The duck tour boat is on fire on the river. pic.twitter.com/k44TFh4sRi-- Harry Cole (@MrHarryCole) September 29, 2013
Fire fighters on the scene. Boat on fire but still floating: pic.twitter.com/QPCAVlM4HK-- Harry Cole (@MrHarryCole) September 29, 2013
Passengers evacuated onto speed boat: pic.twitter.com/8qKitIiL9V-- Harry Cole (@MrHarryCole) September 29, 2013
Survivors of Duck Tour go past another Duck Tour: pic.twitter.com/1Phs5n8PgR-- Harry Cole (@MrHarryCole) September 29, 2013
London's Ambulance Service revealed seven patients are being treated for smoke inhalation and one man & one woman taken to hospital with minor injuries.
The fire brigade also tweeted: "Fortunately there don't seem to be any serious injuries but clearly people are cold, wet & in shock."
The cause of the fire is not yet known.