MOSCOW, December 29, 23:02 /ITAR-TASS/. Investigators do not rule out that the explosive device used in a terrorist attack in Russia’s southern city of Volgograd could have been activated by a man, Spokesman for the Russian Investigations Committee Vladimir Markin told Itar-Tass on Sunday.

“Investigators are looking at a theory that the bomb at Volgograd’s railway station could have been detonated by a man, not woman,” he said.

Earlier, Markin said that forensic genetic study had been appointed to identify the female suicide bomber.

A suicide bomber set off an explosive device at Volgograd’s central railway station at 12:45 Moscow time on Sunday. According to the latest reports, as many as 16 people were killed in the blast, 43 sought medical assistance. The Volgograd regional authorities declared a three-day mourning /from January 1 through January 3/ over the victims of the terrorist attack.