10 injured in St Petersburg supermarket explosion

Latest: At least 10 people have been injured by an explosion at a supermarket in St. Petersburg, Russian officials say.

Update 7.25pm: At least 10 people have been injured by an explosion at a supermarket in St. Petersburg, Russian officials say.

The Investigative Committee, the nation's top investigative agency, said a device containing 200 grams of explosives went off at a storage area for customers' bags on Wednesday.