The Perekrestok supermarket in St Petersburg was rocked by a huge explosion, leaving at least 10 people injured. The store is located in the northwest of the city, and shoppers fled in panic as emergency crews descended on the scene.
It is thought a bomb packed with shrapnel exploded in a storage locker, and authorities are treating the explosion as a deliberate attempt to kill. One person is believed to be in a serious condition, while a further three were taken to hospital. Six more were treated at the scene.