UK Syria fighters: Father says police '100% failed'
27 June 2014 Last updated at 12:49 BST
The head of Wales' counter-terrorism unit has denied that police are failing in their efforts to combat the radicalisation of young Muslims.
It comes after a video showed two young Cardiff men urging others to join a jihadist fight in Syria and Iraq.
The father of one of them - Nasser Muthana - claimed police had failed to win the trust of Welsh Muslims.
South Wales Police Assistant Chief Constable Nikki Holland said police could not "keep a hold of everybody".
Ahmed Muthana told the BBC's Hywel Griffith that he had seen no sign that his 20-year-old son was radicalised.
He said that police and the authorities had failed in their anti-terrorist strategies, including monitoring internet and social media communications.