St. Petersburg Metro Explosion
Scenes from the aftermath of an explosion that hit the subway system in St. Petersburg, Russia, on April 3.

1
Emergency-services personnel tend to an injured person outside the Sennaya Ploshchad subway station.

2
An injured person seen outside the Sennaya Ploshchad subway station.

3
Emergency vehicles and a helicopter are seen outside the St. Petersburg Metro's Tekhnologichesky Institut station.

4
An injured person is treated outside the Sennaya Ploshchad subway station.

5
Police officers block an entrance to the Tekhnologichesky Institut subway station.

6
An injured person is helped by emergency services outside the Sennaya Ploshchad subway station.

7
Emergency vehicles and a helicopter seen outside the entrance to St. Petersburg's Tekhnologichesky Institut subway station.

8
An injured person stands outside the Sennaya Ploshchad subway station.