Photos : Female Suicide Bomber Blows Up Train Station In Russia, Kills 16

A massive explosion at a train station in the Russian city of Volgograd has killed at least 16 people, including one police officer, as many as 50 people were wounded - at least half of them are in critical condition., including a 9-year-old girl.

According to reports, the blast was carried out by a female suicide bomber who detonated her explosives in front of a metal detector just inside the main entrance of the train station.

One woman had a narrow escape when she left the station just moments before the bomb went off, reports CBS News's Holly Williams.

"I saw people running," she said. "Human flesh all around, shattered glass and broken doors. I saw smoke, but I didn't understand what was going on."

This would be the second deadly attack on Russia in just two months as Russia prepares to host the 2014 Winter Olympics in the Black Sea city of Sochi in less than six weeks' time.

In October, another female suicide bomber blew herself up on a city bus in Volgograd, killing six people and injuring about 30.

See photos below: