Washington (AFP) - The Islamic State jihadist group claimed it executed British aid worker David Haines, in retaliation for British leader David Cameron entering a coalition with the United States against the militants.
This would be the third such execution in recent weeks, after two US journalists taken hostage in Syria were shown murdered.
The Islamist group released a video, available on the website of private terrorism monitoring group SITE, purportedly showing a masked militant beheading Haines.