The Islamic State of Iraq and Syria released a video Friday afternoon purportedly showing the beheading of British aid worker Alan Henning, the Associated Press reports.
Henning, a 47-year-old cab driver from Manchester, had been held hostage in Syria since last December. He had been in the country as part of an aid convoy to bring medical supplies to refugees.
In the video, a disguised member of ISIS also threatened the life of Peter Kassig, an American, according to BuzzFeed. Kassig, a former U.S. soldier, had been treating Syrian refugees in a Lebanese hospital, but it's unclear whether he had been abducted. ISIS claims to have at least two other hostages—an American aid worker and a British freelance journalist. U.S. or British officials have not yet verified the authenticity of this latest video.
Henning, a father of two, would be the fourth Western hostage to be killed by ISIS militants this year. In August, the extremist group released a video showing the murder of American journalist James Foley. At the time, the White House called Foley's murder "a terrorist attack." On Sept. 2, ISIS released footage of the murder of Steven Sotloff, another American journalist. On Sept. 13, a video showed the execution of David Cawthorne Haines, also a British aid worker. Henning was shown at the end of that video.