Washington: The Islamic State jihadist group claimed that it beheaded British aid worker David Haines.
The militant outfit released a 2 minute and 27 second long video, available on the website of private terrorism monitoring group SITE, purportedly showing a masked militant beheading Haines.
The video, titled ‘A Message to the Allies of America', blames British Prime Minister David Cameron for joining forces with the United States, which has said it is at ‘war' with the jihadists and launched air strikes against them in Iraq.
The beheading of Haines was third such execution in recent weeks, after two US journalists were shown murdered.
"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," the executioner says in the video.
The militant told Britain the alliance will ‘accelerate your destruction' and will drag the British people into ‘another bloody and unwinnable war'.
He also threatens to execute another British hostage.
