Russian President Vladimir Putin on Wednesday made a pre-dawn visit to the city reeling from two suicide bombings this week, bringing gestures of sympathy for the victims and questions for the officials he has ordered to beef up security.
Ten people were killed on Monday in a bombing that destroyed a packed trolleybus in the southern Russian city of Volgograd, the second attack in the city in two days after a suicide strike on its main train station, officials said.
Russian police says attackers set fire to a Muslim prayer house in a southern Russian city earlier rocked by a suicide bombing.
By Eleonore Dermy
The city of Volgograd was renamed Stalingrad for a day on Saturday as Russia marked the 70th anniversary of a brutal battle in which the Red Army defeated Nazi forces and changed the course of World War II.