A homemade bomb blast at a supermarket in the Russian city of Saint Petersburg has injured ten people, sparking a probe into attempted murder.
Photo from video
The incident comes several months after Russia's second city was rocked with a metro bombing in April which killed 16 people.
"According to preliminary information, an explosion of an unidentified object occurred in a store," a spokeswoman for Russia's Investigative Committee, Svetlana Petrenko, said in a statement.
The blast was caused by a "homemade explosive device with the power equivalent to 200 grammes of TNT filled with lethal fragments," she said.
"The investigation is looking at all possible causes of what happened," she said, adding that a probe for attempted murder had been launched.
The blast comes amid concern that hundreds of Russian citizens who travelled to fight alongside jihadists groups abroad could pose a mounting security challenge back home.
Saint Petersburg, which is set to host World Cup matches next year, is still reeling from the deadly metro bombing in April that killed 16 and wounded dozens.
That bombing was claimed by a group linked to Al-Qaeda which said it was a message to countries engaged in war with Muslims.
In July, the Federal Security Service said it had detained seven people who were preparing "acts of terror" in Saint Petersburg, particularly its railway system and major public gathering places.
