The wife of British hostage Alan Henning has issued a new appeal to his Islamic State captors urging them to "open their hearts and minds" and release her husband.
Barbara Henning has issued a statement after she received an audio message from him pleading for his life.
The taxi driver from Salford was taking aid to Syria when he was captured.
In the statement, Mrs Henning says "I am Barbara Henning, the wife of Alan Henning. I have a further message for Islamic State.
"An audio file of Alan pleading for his life has just been received by me. I and people representing me continue to reach out to those holding Alan. Islamic State continue to ignore our pleas to open dialogue."
Mr Henning travelled to Syria in December last year as part of a convoy delivering humanitarian aid to Syrian citizens.
He had volunteered to drive an ambulance full of medical supplies as part of the charity trip, which was organised by the Bolton and the UK Arab Society.
The group planned to transport life-saving medical equipment to a hospital in Idlib, in northwestern Syria.
It is believed Mr Henning was abducted by IS in al Dana, a town 24 miles from Aleppo, shortly after arriving in the country.
Mrs Henning said her husband went to Syria to help the country's "most vulnerable" people by delivering "much-needed aid".
"We are at a loss (as to) why those leading Islamic State cannot open their hearts and minds to the facts surrounding Alan's imprisonment and why they continue to threaten his life," she said.
"I have been told that he has been to a Sharia Court and found innocent of being a spy and declared to be no threat. I implore Islamic State to abide by the decisions of their own justice system. Please release Alan."
Britian's role
Meanwhile, Prime Minister David Cameron is in talks over Britain's role in the battle against Islamic State fighters.
Mr Cameron was consulted before the US and Arab Allies launched strikes against the terrorist group in Syria overnight.
Downing Street said Mr Cameron would spend the next 48 hours at the United Nations discussing "what more the UK and others can do to contribute to international efforts to tackle the threat we face from ISIL".
There have been suggestions the PM could recall MPs, who are on recess for the party conference season, as soon as Friday to consult on the issue of Britain joining the US airstrikes.
Speaking after the US and five Arab nations launched their strikes in Syria, President Barack Obama repeated his vow to build an international coalition to defeat IS.
He said defeating IS would take time and effort, but added: "We're going to do what's necessary to take the fight to this terrorist group."
