[Ed. – Radical Muslims from the Caucasus have hit Russian targets a number of times. They would be the most likely suspects. Don’t forget, terrorists from the Caucasus — Chechnya and Dagestan — were heavily involved in the formation of ISIS in its early days.]
At least 10 people were killed in a blast on the St. Petersburg metro Monday, three state-run Russian news agencies said. Authorities say the explosion is a terrorist attack.
An explosion tore through a train as it was traveling between two stations in Russia’s second-biggest city, injuring dozens more.
A second device was found and defused at another station, Russia’s Anti-Terrorism Committee said. No group has claimed responsibility for the attack, which led to the shutdown of the city’s metro system.
President Vladimir Putin, who had been in St. Petersburg earlier in the day, laid roses at a makeshift memorial with candles outside the bombed metro station.