Threat of Brits fighting in Syria 'an absolute nightmare'

Richard Barrett, the former head of counter-terrorism at MI6 has described the threat from Britons fighting in Iraq and Syria as "an absolute nightmare".

ITV News Correspondent Lewis Vaughan Jones reports from Cardiff, once home to several men now known to be involved with Isis extremists in the Middle East.

More: British Jihadi's father: I wish I could ask him to come back


Cardiff mosque: We were not involved in radicalisation

Leaders of a Cardiff mosque, attended by three young men who are now fighting in Syria, say they had nothing to do with their radicalisation.