In a video released Saturday on a website associated with the group ISIS, British aid worker David Haines was executed, making him the third Western captive to be killed by the extremist group in recent weeks, according to CNN.

The video, entitled “a message to the allies of America,” was produced similarly to the videos that showed the executions of American journalists James Foley and Steven Sotloff. In Sotloff’s video, Haines appears at the end where his life is threatened.

At the end of the new video, masked ISIS militant places his hand on another captive, whom he identified as Alan Henning, a British citizen.

Haines was a logistics and security manager for the Agency for Technical Cooperation and Development, a nongovernmental humanitarian agency. Haines, 44, was abducted in March 2013 near a refugee camp in Atmeh, Syria.

Here is a transcription of the video:

Video cuts to a black screen with Arabic text and “A Message to the Allies of America” written in English before showing Haines on his knees in an orange jumpsuit with an executioner dressed in black standing to his left and holding a knife.

Haines: My Name is David Cawthorne Haines. I would like to declare that I hold you, David Cameron, entirely responsible for my execution.

You entered voluntarily into a coalition with the United States against the Islamic State, just as your predecessor Tony Blair did, following a trend amongst our British prime ministers who can’t find the courage to say no to the Americans.

Unfortunately, it is we the British public that in the end will pay for the price for our parliament’s selfish decisions.

Executioner: This British man has to pay the price for your promise, Cameron, to arm the Peshmerga against the Islamic State.

Ironically, he has spent a decade of his life serving under the brutal air force that is responsible for delivering those arms.

Your evil alliance with America, which continues to strike the Muslims of Iraq and most recently bombed the Haditha Dam, will only accelerate your destruction, and playing the role of the obedient lapdog, Cameron, will only drag you and your people into another bloody and unwinnable war.

If you, Cameron, insist on fighting the Islamic State then you, like your master, Obama, will have the blood of your people on your hands.

Video from CNN: