Russia says submarine hit by fire was nuclear-powered

Russian Defence Minister Sergei Shoigu said on Thursday that a top-secret military submarine that was hit by a fatal fire on board earlier this week was nuclear-powered.

In comments published on the Kremlin's website, Shoigu told President Vladimir Putin that the incident that killed 14 sailors was caused by a fire in the battery compartment and that the nuclear reactor on board had been completely isolated.