The Russian authorities have arrested 11 people, including four suspected gunmen, in connection with a shooting rampage that killed at least 115 people in a concert hall near Moscow.
The Kremlin said FSB security service chief Alexander Bortnikov had reported to President Vladimir Putin that those detained included "four terrorists" and that the service was working to identify their accomplices.
Russia's Investigative Committee said the death toll had leapt to 115 from the attack in which camouflage-clad gunmen opened fire with automatic weapons at concertgoers near the capital on Friday (March 22) night.