Syria (BBN)-A video purporting to show UK hostage Alan Henning being beheaded has been released by Islamic State militants.
The Salford taxi driver was delivering aid to Syria in December when he was kidnapped and then held hostage by IS, reports BBC.
IS threatened to kill him in footage last month showing the death of Briton David Haines, and in this video they threaten US aid worker Peter Kassig.
David Cameron said Britain would do all it could “to hunt down these murderers and bring them to justice”.
The prime minister said the killing of father-of-two Henning, 47, showed “how barbaric and repulsive” IS was.
“My thoughts and prayers tonight are with Alan’s wife Barbara, their children and all those who loved him,” he said.
“Alan had gone to Syria to help get aid to people of all faiths in their hour of need.”
Henning’s wife Barbara had this week appealed for her husband’s release, saying: “He is innocent.”
IS has previously released videos showing the apparent beheadings of two US journalists James Foley and Steven Sotloff, and British aid worker Haines.
The video released on Friday is yet to be verified, but it appears to show Henning kneeling beside a militant, dressed in black, in a desert setting.
The footage ends with an IS fighter threatening a man they identify as Kassig.
In a statement, Kassig’s family said he had converted to Islam and referred to him as Abdul Rahman Kassig.
They asked people around the world to pray for his release and that of “all innocent people being held hostage in the Middle East and around the globe”.
They also asked people to pray for Henning’s family, adding: “We have read about his work and his generous character with great respect and admiration.”
‘BRITISH ACCENT’
BBC security correspondent Gordon Corera said the footage was similar to previous videos released by IS, though slightly shorter.
He said it included a reference to last week’s vote by UK Parliament to authorise air strikes against IS in Iraq.
Like previous videos it features a militant with an apparently British accent, he added.
The UK Foreign Office said in a statement: “We are aware of the video and are working urgently to verify the contents.
“If true, this is a further disgusting murder.
“We are offering the family every support possible; they ask to be left alone at this time.”
The US said it was evaluating the video and if proved real, it was “another demonstration of the brutality” of the militant group.
This latest murder video from the jihadists who call themselves Islamic State is likely to dismay and disgust even many of those who disapprove of western military action against IS.
While countless Muslims have already condemned the extreme and graphic violence of IS, the case of Alan Henning struck a special chord with his many Muslim friends.
He had given up Christmas with his family to deliver aid to Syrians in need, only to end up in the hands of his eventual murderers.
Even individuals who the UK government suspected of extremist leanings had pleaded for his release.
The fact that their pleas fell on deaf ears may now possibly convince others sympathetic to IS that their actions are beyond the pale.
US President Barack Obama led widespread condemnation of the killing, calling it a “brutal murder” and saying it was a “great loss” to the Syrian people Henning had been trying to help.
Dr Shuja Shafi, secretary general of the Muslim Council of Britain, tweeted: “Saddened by reported murder of Alan Henning. A despicable and offensive act. He helped Muslims. My thoughts and prayers with his family.”
Mohammed Shafiq, chief executive of the Ramadhan Foundation, said: “This barbaric killing is an attack against all decent people around the world.”
Deputy Prime Minister Nick Clegg offered his “sincere condolences” to the Henning family and said of IS: “We are resolved to defeat this evil.”
Labour leader Ed Miliband called the killing “appalling and barbaric”.
Earlier this week Mrs Henning had asked for “mercy” for her husband, saying his family was continuing their attempts to communicate with the group.
She also said she had received an audio message of her husband pleading for his life.
Mrs Henning had said some people thought her husband was in the wrong place at the wrong time, but she said: “He was in the right place doing the right thing.”
Earlier on Friday, the father of another hostage, British journalist John Cantlie, appealed for him to be released “to those he loves and who love him”.
The journalist, who was kidnapped in Syria in 2012, has so far appeared in three videos in which he has delivered scripted messages responding to military attacks on IS.
RAF Tornados first hit IS targets on Tuesday, four days after Parliament authorised UK involvement in the military campaign.
The aircraft have been conducting daily flights over Iraq, and carrying out air strikes against vehicles and weapons positions to assist Kurdish ground forces.
The UK is among the nations that have joined forces to tackle the militant group, which has seized large parts of Iraq and Syria.
IS has declared a so-called caliphate in the areas it has taken.
BBN/JF-04Oct14-10:00am (BST)