A new video by the militant Islamic State group claims that US aid worker Peter Kassig has been beheaded.

In the 16-minute video uploaded to social networks today, a black-clad militant with his face concealed stands before a body he claims is that of Mr Kassig.
The 26-year-old was captured last year while helping provide medical aid to Syrians. His friends say he converted to Islam in captivity and changed his name to Abdul-Rahman.

The video also shows what appears to be the mass murder of several captured Syrian soldiers.

It was not immediately possible to confirm that Mr Kassig was pictured in the video. Family representatives were not available for comment.

The video showing what appeared to be the fifth beheading victim of the Islamic State militant known as Jihadi John was released just hours after reports emerged that he was injured in an allied air strike.

The masked fanatic, who is thought to be British and speaks with a London accent, is believed to be responsible for the killings of David Haines and Alan Henning - both from Britain - and Americans James Foley, Steven Sotloff and now Peter Kassig.

Footage of Mr Kassig's death was posted online today but it is not known whether it was shot before the reported US-led air strike on a summit of IS commanders.
It is claimed he was taken to hospital after narrowly escaping death in the raid on the town of Al Qaim, in Anbar province, near Iraq's border with Syria, which is said to have taken place on November 8.

UK Prime Minister David Cameron said earlier today that he wants Jihadi John to face justice. 

Jihadi John has become one of the world's most wanted men since the release of the first beheading footage - the killing of US journalist James Foley - on August 19.

Only his eyes are visible during the videos and no-one has officially confirmed who he is.

In September, FBI director James Comey revealed that intelligence services had identified the man. However, he refused to give the individual's name or nationality publicly.

Mr Comey did not say whether the FBI believes the man actually carries out the murders himself or if that is done by someone else when the camera is turned off. The release of yet another beheading video will intensify international efforts to track down Jihadi John as soon as possible.