MOSCOW, May 18 (RAPSI, Oleg Sivozhelezov) – Investigators have charged Mukhamadyusup Ermatov, one of the defendants in the St. Petersburg metro blast case, with terrorism and illegal trafficking of explosives, the Investigative Committee announced on Thursday.

Ermatov, was arrested on May 11 and later put in detention. Investigators believe that he was related to alleged suicide bomber Akbarzhon Dzhalilov. The man has pleaded guilty in part.

Earlier, charges have been brought against six other defendants in the case. In total, eleven people have been arrested and put in jail in St. Petersburg and Moscow on suspicion of involvement in organizing the terror attack.

On April 3, an unknown device exploded in a train between St. Petersburg metro stations Technological Institute and Sennaya Ploshchad. According to the most recent information, 16 people died in the blast including a suicide bomber, over 50 were wounded.