10 Killed In Explosion Inside St. Petersburg, Russia, Metro Station

Russian media outlets say the explosion happened inside one of the metro train cars.
The Metro in St. Petersburg, Russia.

Russian News Agency TASS is reporting at least 10 people were killed in an explosion inside a metro station in St. Petersburg on Monday afternoon.

RT reports the explosion happened at the underground Sennaya station.

Social media posts appeared to show people walking through a smoke-filled station.

State-owned Russia 24 reports the device was packed with shrapnel-like elements and was detonated inside one of the metro trains. 

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