The explosion happened as the train was travelling between the stations Tekhnologichesky Institut and Sennaya Ploshchad of the St. Petersburg Metro, the National Antiterrorism Committee (NAC) confirmed.
Health Minister Veronika Skvortsova said there were 47 victims of the blast and gave the number of fatalities as 10. She said six people treated in St. Petersburg hospitals for injuries sustained in the incident remain in a critical condition.
The minister added that among the victims was a 15-year-old girl, who has burns and a head injury.
Russian President Vladimir Putin commented that “The causes of this event have not been determined yet, so it’s too early to talk about [possible causes]. The investigation will show. Certainly, we will consider all possibilities: common, criminal, but first of all of a terrorist nature.”
All Metro stations are closed to passengers. Commuters were evacuated from the subway within about an hour of the first reports of the blast coming in.
An undetonated improvised explosive device (IED) was discovered by investigators at the Ploshchad Vosstaniya Station and defused by specialists, the NAC reported. It rejected media reports, which claimed that more than one explosion occurred, saying no evidence supporting this was found.
A St. Petersburg resident told RT that he “was going to Mayakovskaya station [not far from Sennaya Square, the station that was hit] when the alarm went on and the security guards started to block all the entrances. They just told people to get away from the area and suggested not using the Metro today.”
According to the resident, who identified himself as Alex, “there was a bit of panic in the eyes of the people,” both passengers and subway staff alike.
“As there was an announcement that all the stations will be closed due to technical reasons,” people understood that something was wrong and rushed to the exits, he said.
Alex also recalled that he saw ambulances and police cars arriving at the station.