Reyaad Khan, left, appears in a propaganda video with fellow Isis fighters.
A FORMER student from Cardiff faces a war crimes inquiry after bragging about his involvement in the “execution” of prisoners while fight–ing for a terrorist group in Syria.
Reyaad Khan, who once dreamt of becoming Britain’s first Asian prime minister, appears to have revelled in the killings, carried out by a unit of the Islamic State in Iraq and al-Sham, or Isis.
On one occasion, he posted on Twitter gruesome photographs of the alleged victims’ maimed corpses.
The developments came as security officials warned that half the Britons who travelled to Syria to take part in jihad had crossed the border and were fighting with Isis in neighbouring Iraq. Up to 500 British Muslims are thought to be in the region.