(Mark F. Levisay, Creative Commons

The suspected female suicide bomber detonated an explosive device before she could pass through the metal detectors at a train station in the city of Volgograd.

According to the website of the Investigative Committee of Russia, a police officer was among those killed. The committee's head Vladimir Markin also reported that the remains of the bomber will undergo DNA testing.

This is the second suicide attack to occur in Volgograd in two days.

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