British PM condemns hostage murder

Born in Holderness, East Yorkshire, Mr Haines went to school in Perth and had been living in Croatia. His parents live in Ayr.
   The 44-year-old aid worker was seized in Syria in 2013. He was being held by Islamic State militants who have already killed two US captives.

The latest video also includes a threat to kill a second British hostage.
The PM vowed to do everything possible to find the killers. Mr Haines's family said he would be "missed terribly".
'Despicable and appalling' In a statement released by the Foreign Office, Mike Haines said his brother, a father of two, "was and is loved by all his family".
"David was most alive and enthusiastic in his humanitarian roles. His joy and anticipation for the work he went to do in Syria is for myself and family the most important element of this whole sad affair," he said.
Mr Cameron, who is due to chair an emergency Cobra committee meeting later, said the murder of an innocent aid worker was "despicable and appalling".
"It is an act of pure evil. My heart goes out to the family of David Haines who have shown extraordinary courage and fortitude throughout this ordeal.
"We will do everything in our power to hunt down these murderers and ensure they face justice, however long it takes," the prime minister added.
'Grief and resolve' The Foreign Office is working to verify the video, which was released on Saturday night. It begins with a clip of Mr Cameron and then features a man who appears to be Mr Haines dressed in orange overalls, kneeling in front of a masked man holding a knife.
The victim says: "My name is David Cawthorne Haines. I would like to declare that I hold you, David Cameron, entirely responsible for my execution."
He says Mr Cameron had entered into a coalition with the US against the Islamic State "just as your predecessor Tony Blair did".
"Unfortunately it is we the British public that in the end will pay the price for our parliament's selfish decisions," he said.
The militant, who appears to have a British accent, is then recorded as saying: "This British man has to the pay the price for your promise, Cameron, to arm the Peshmerga against the Islamic State."
Islamic State is now in control of large parts of Iraq and Syria and the CIA estimates that the group could have as many as 30,000 fighters in the region.
The UK has donated heavy machine guns and ammunition to authorities in Iraq to help fight IS militants, the Ministry of Defence previously said.
Kurdish forces, known as the Peshmerga, have been involved in heavy fighting with IS.
US President Barack Obama said "our hearts go out to the family of Mr Haines and to the people of the United Kingdom".
In a statement he said the US would work with the UK and a "broad coalition of nations" to "bring the perpetrators of this outrageous act to justice".
"The United States stands shoulder to shoulder tonight with our close friend and ally in grief and resolve," he added.
Scottish First Minister Alex Salmond said the release of the video "demonstrated a degree of brutality which defies description".
"It should be remembered that Mr Haines was in the region as an aid worker helping local people," Mr Salmond added.
"His murder will be totally condemned by all people with any sense of humanity."
Labour leader Ed Miliband said he was "sickened at the disgusting, barbaric killing" of Mr Haines.