Explosion at Russian station kills at least 18, injures 40

The Russian anti-terrorism committee said a female suicide bomber, a Dagestan national, blew herself up Sunday at the Volgograd railway station in southern Russia near the metal detectors at the entrance. At least 18 people were killed and dozens wounded.  With the Sochi Winter Olympics just six weeks away, President Vladimir Putin has ordered law enforcement agencies to take all possible security precautions against further attacks. No group has taken responsibility for the Volgograd bombing. Last July the Islamist rebel Chechen leader Doku Umarov urged his followers to use “maximum force” to prevent the games from taking place.