At least 10 people have been killed and another 50 injured. One witness claimed the bomb might have been planted in a briefcase by a man who then changed carriages. A second unexploded device was later found and deactivated at another station, Revolutionary Square. Russia’s President Putin – who was meeting his Belarusian counterpart Lukashenko in St Petersburg today – has expressed his condolences after the “possible terror attack”. All train stations have been closed. The investigation of the blast will immediately focus on interviewing witnesses, gathering evidence from the scene and studying shrapnel from the explosive to determine what it was and how it was made. The St. Petersburg metro has five lines and 67 stations. It transports 2.3 million people a day and has more than 1,600 train cars.
The blast on Monday killed at least 14 people, the Russian health minister, Veronika Skvortsova,said.