LONDON - Muslim groups across Britain called on Thursday for the release of British hostage Alan Henning, a volunteer aid worker captured in Syria whose life was threatened in a recent video released by Islamic State militants.
Henning was part of an aid convoy taking medical supplies to a hospital in northwest Syria in December last year when it was stopped by gunmen and he was taken away.
In a video released on Saturday which showed the beheading of fellow British aid worker David Haines, an Islamic State militant threatened to kill Henning if Prime Minister David Cameron continued to support the fight against them.
The man in the video is himself believed to be a British national and has been dubbed "Jihadi John" by UK media.
"We, the undersigned British Muslim Imams, organizations and individuals, wish to express our horror and revulsion at the senseless murder of David Haines and the threat to the life of our fellow British citizen, Alan Henning," said a letter signed by more than 100 Muslim groups and leaders.