Dramatic footage has emerged of armed police arresting a suspected ISIS terrorist over the metro bombing in St Petersburg that killed 16.
Three agents from the Russian Federal Security Service (FSB) were filmed detaining a man at Khrabrovo International Airport in the city of Kaliningrad in north-western Russia.
The terror attack on the metro system April 3 last year, took the lives of 16 people and injured more than 100.
A bomb contained in a briefcase was detonated on a train as it travelled between the stations of Sennaya Ploshchad and Tekhnologichesky Institut.
A second bomb was found but defused.
Russian media have reported that the arrested man is suspected of being a member of Jamaat al-Tawhid Wal-Jihad, which they said was a unit of IS operating in Russia.