IS says it has beheaded Russian foreign fighter for spying

The video shows the alleged spy being interrogated by a masked man, at which point he says he was sent to Syria to spy on IS top military commander Omar al-Shishani who was killed last year in a US airstrike, and later, on his knees somewhere in the desert where he is killed by a Russian-speaking man.

Thousands of fighters from the former Soviet Union have joined IS in Syria and Iraq.