Abu Muthanna al-Yemeni (centre), believed to be Nasser Muthana, a 20-year-old man from Cardiff
Media playback is unsupported on your device
Video

Dr Suraj Lakhan: Radicalisation 'problem in Cardiff'

More details have emerged about three young men from Cardiff who have travelled to join the Isis fundamentalist fighters in Syria and Iraq.

The BBC understand they are two brothers Naser and Aseel Muthana and Reyaad Khan a friend of Naser.

Ahmed Muthana, father of the two brothers has spoken of his shock at seeing his son, Nasser Muthana, in the video.

Dr Suraj Lakhan, from Cardiff University, who recently completed his doctorate entitled: 'A Social Analysis of Radicalisation in the UK' said there was a radicalisation problem in Cardiff, but not from the mosques.

"There's been a threat for a while, and it's still ongoing," he told Oliver Hides on BBC Radio Wales' Good Morning Wales.

"There's nothing happening with the mosques, very little radicalisation happens with mosques now. The internet has a role to play but a lot of it is face-to-face interaction."

  • 23 Jun 2014
  • From the section Wales
Go to next video: Tracking all fighters 'impossible'