Flooding a variety of social media platforms are pictures of a blasted train car and passengers fleeing the scene of what the Russian Prime Minister, Dmitry Medvedev is calling “an act of terrorism.”

It was just a normal day for most people in Russia until an explosion between two metro stations resulted in eleven casualties early Monday morning.

Reportedly, there was only one blast in between the Sennaya Ploshad station and Technological Institute station around 2:40 p.m and the explosive went off on a train passing through the middle of the stations. The stations filled with smoke and panic after the bomb went off, and likely didn’t go away until long after.

Russia’s National Anti-Terrorism Committee reported eleven people had died and forty-five were injured.

The Russian President Vladimir Putin, spoke after the explosion, offering his deepest sympathies.

“The reasons for the explosion are unknown, so it’s too early to talk about it. The investigation will show what happened,” Putin said according to CNN.

Another explosive device was detected and disarmed in another metro station in St. Petersburg explained Russia’s National Anti-Terrorism Committee.

Flowers and tributes were laid in memory of those who have lost their lives in this tragedy.

According to the city’s press office, the metro stations in St. Petersburg are shut down until further notice.