How many people on the Russian submarine survived the accident?

Russian news agencies say at least 20 sailors and shipyard workers have died and 21 others were injured in an accident aboard a Russian nuclear-powered submarine. The report did not say where the submarine is located only that it was taking part in exercises and had a crew of 208 aboard. Media reports say the accident involved the failure of a fire extinguishing system in the front of the vessel, the nuclear reactor is in the rear of the sub and was not damaged. Another Russian vessel is transporting crew members from the submarine to port.