Syrian Rebel Abu Sakkar Filmed Eating Soldier's Lung Has No Regrets & Promises More Slaughter (GRAPHIC VIDEO, PICTURES)

The Syrian rebel commander filmed biting into a dead soldier’s lung has insisted he has no regrets.

The clip, which was verified by Human Rights Watch (HRW), showed Khalid al-Hamad (who is also known as Abu Sakkar) hacking into the man’s body and removing organs before raising the lung to his lips.

He is heard saying: “I swear to God we will eat your hearts and your livers, you soldiers of Bashar the dog,” to offscreen cheering.

Scroll down to see pixellated video (WARNING, GRAPHIC CONTENT)

Rebel leader Abu Sakkar takes a bite out of the soldier's lung

HRW described the act as a “war crime” but al-Hamad is unrepentant – and has promised more slaughter.

In an exclusive Skype interview with TIME magazine, he explains his actions: “We opened his cell phone, and I found a clip of a woman and her two daughters fully naked and he was humiliating them, and sticking a stick here and there.”

The magazine also claims al-Hamad was biting into a lung and not, as initially reported, a heart. It says a surgeon has confirmed this.

Sunni al-Hamad revealed he has a further grisly video of himself killing a soldier from the Alawaite faith (which President Bashar Assad follows).

'I swear to God we will eat your hearts and your livers, you soldiers of Bashar the dog'

He said: “Hopefully we will slaughter all of them [Alawites]. I have another video clip that I will send to them. In the clip, I am sawing another shabiha [pro-government militiaman] with a saw. The saw we use to cut trees. I sawed him into small pieces and large ones.”

The video comes to light as David Cameron announced Britain is to double military support for Syrian rebels to help them withstand the “onslaught” from Bashar Assad’s regime.

He also suggested Russia could be ready to participate in a peace process, saying there was "real political will" to find a solution.

Cameron was speaking at a White House press conference with Barack Obama on Monday.

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The British Prime Minister earlier confirmed nerve agent Sarin appeared to have been used during the two-year civil war.

The Syrian Observatory for Human Rights recorded March as the bloodiest month of the conflict so far, with more than 6,000 people killed, including more than 500 women and children.

So far the Observatory has recorded more than 80,000 deaths but believes the real number of those killed to be much higher. The UN says more than 70,000 people have died since the uprising began in March 2011.