A British hostage who appears in a newly-released Islamic State video has been identified as journalist John Cantlie.
Mr Cantlie, who is a former war photographer and correspondent for The Sunday Times, The Sun and The Sunday Telegraph, was captured by militants in Syria in 2012.
The video, which was posted to YouTube, was swiftly removed from the website.
The captive says he is a prisoner, but ITV News is unable to determine the circumstances or threats he may have been under during the filming.
ITV News has chosen not to reproduce the video in full, but publish a transcript of the words spoken by Mr Cantlie below:
"Hello, my name is John Cantlie. I'm a British journalist who used to work for some of the bigger newspapers and magazines in the UK - including The Sunday Times, The Sun and The Sunday Telegraph.
"In November 2012 I came to Syria where I was subsequently captured by the Islamic State.
"Now, nearly two years later many things have changed, including the expansion of the Islamic State to include large areas of eastern Syria and western Iraq, a land mass bigger than Britain and many other nations.
"Now, I know what you're thinking ... you're thinking, 'He's only doing this because he's a prisoner. He's got a gun at his head and he's being forced to do this ... right?'
"Well, it's true. I am a prisoner, that I cannot deny. But seeing as I've been abandoned by my government and my fate now lies in the hands of the Islamic State, I have nothing to lose.
"Maybe I will live, and maybe I WILL die. But I want to take this opportunity to convey some facts that you can verify. Facts that if you contemplate, might help preserving lives.
"Over the next few programmes I am going to show you the truth as the Western media tries to drag the public back to the abyss of another war with the Islamic State.
"After two disastrous and hugely unpopular wars in Afghanistan and Iraq - why is it that our governments appear so keen to get involved in yet another unwinnable conflict?
"I'm going to show you the truth behind the systems and motivation of the Islamic State and how the Western media - the very organisation I used to work for - can twist and manipulate that truth for the public back home.
"There are two sides to every story - think you're getting the whole picture?
"And I'll show you the truth behind what happened when many European citizens were imprisoned and later released by the Islamic State, and how the British and American governments thought they could do it differently to every other European country.
"They negotiated with the Islamic State and got their people home, while the British and Americans were left behind.
"It's very alarming to see where this is all headed, and it looks like history repeating itself yet again.
"There is time to change this seemingly inevitable sequence of events, but only if you - the public - act now
"Join me for the next few programmes and I think you may be surprised at what you learn."