An explosion at a train station in the southern Russian city of Volgograd has killed at least 13 people, reports say.
A female suicide bomber was thought to be responsible for the blast, Russia’s anti-terrorism committee said.
A suspected female suicide bomber killed at least six people when she attacked a bus in the city in October.
Moscow is concerned militant groups could be ramping up violence in the run up to the the 2014 winter Olympic Games in the city of Sochi in six weeks.
Source: BBC News