By Sergei Karpov
VOLGOGRAD, Russia
(Reuters)—A suicide attacker set off a bomb in the entrance hall of a Russian train station on Sunday, investigators said, killing at least 16 people in the second deadly attack within three days as Russia prepares to host the Winter Olympics.
Authorities said the attacker detonated a shrapnel-filled bomb in front of a metal detector just inside the main entrance of the station in Volgograd, a busy hub north of the violence-plagued North Caucasus region on Russia’s southern fringe.
Islamist militants in the North Caucasus have carried out a long string of attacks since President Vladimir Putin came to power in 2000. They now confront him with his biggest security challenge, threatening to disrupt the Olympics that start in the Black Sea resort of Sochi in 40 days.
(Raw video of the bombing released by AP)
Read more and see more video at Reuters