Video:
===================================================================
By Alla Eshcheko and Steve Almasy, CNN
Updated 1:58 PM EST, Sun December 29, 2013
Moscow (CNN) -- A massive explosion at a train station in the Russian city of Volgograd killed at least 16 people, including one police officer, the Investigative Committee of Russia said on its website Sunday.
The head of the committee, Vladimir Markin, said 16 people had been killed and 34 people were injured, including a 9-year-old girl.
The female suicide bomber set off the device before she could pass through a metal detector, Markin said, citing available information.
He said the bomber used the equivalent of 10 kilograms of TNT and included shrapnel.
Investigators also found an unexploded grenade.
Video taken from an outside security camera shows a huge fireball inside what appears to be the main entrance of the three-story stone building followed by a steady trail of smoke coming out shattered windows.
Read more: Source