The death toll from the St Petersburg metro bombing has risen to 14, Russia's health minister has said.
Veronika Skvortsova said 11 people died at the scene, one died in an ambulance and two in hospital.
She added that 49 people are still in hospital.
The seven people were from Central Asian countries and investigators say they were recruiting for IS.
The bombing of a subway train in Russia has drawn condemnation from world leaders.
A blast has ripped through an underground train in Russia's second-largest city on Monday.