The Islamic State of Iraq and Syria claims to have beheaded British hostage Alan Henning in an online video released Friday, The Guardian reported.
The video has yet to be verified. But if it is authentic, Henning would be the fourth hostage slain by the Islamist extremists. Each killing has been recorded and uploaded in online videos, with IS militants threatening to behead another hostage at the end of each recording.
Last month, the Sunni jihadists threatened to kill Henning in a video of the beheading of British hostage David Haines. Two other U.S. hostages, journalists James Foley and Steven Sotloff, have also been killed.
IS militants have previously threatened to kill hostages in retaliation for U.S.-led air strikes in Syria and Iraq. The air strikes have since been joined by the U.K., Jordan and Saudi Arabia.
"If you, Cameron, persist in fighting the Islamic State, then you, like your master Obama, will have the blood of your people on your hands," a jihadist said at the end of the video where Haines was killed, referring to British Prime Minister David Cameron.
Intelligence officials are evaluating the latest video to determine its authenticity.
Henning, a taxi driver from Eccles in Greater Manchester, was kidnapped in Syria nine months ago. He was in the country helping a group of Muslim friends deliver aid in a convoy, The Guardian reported. He also helped raise money to for ambulances and medical supplies being transported into Syria.
The group was not far from the Turkish border when armed militants took Henning away claiming they were suspicious he was not Muslim, his fellow volunteers told the newspaper.
His wife, Barbara, appealed for his rescue on Tuesday, according to the BBC.
"He is innocent," she said.
