A recent metro explosion in St Petersburg has killed 11 people, and injured 11 others. The head of the anti-terrorist committee confirmed the news, and said the blast hit a train between Sennaya Ploshchad and Tekhnologichesky Institut stations.
Prime Minister Dmitry Medvedev said the blast was a "terrorist attack," and an anti-terror investigation.
Andrei Przhezdomsky, the head of the National Anti-Terrorist Committee, said that the explosion was caused by an unidentified object, but the exact cause is yet to be determined. Another device was later located at another station, and the explosion was deliberate. The attacker had planted his explosive in a suicase and left it there.
At the moment, the FSB is yet to pinpoint to the perpetrators of this act, but will likely be looking into ISIS organizations, who could be angry because of Russia military activities in Syria, or some Chechen activist, or both.
Chechen militants or IS -inspired are well known for plotting attacks on Russia transport hubs, especially in Moscow. More than 7,000 Russians that had travelled to Syria to help fight alongside ISIS had returned to the country.