One person has been killed and another injured in an explosion on a Russian nuclear submarine in dock for decommissioning.
The blast occurred at the Zvyozdochka shipyard, in Severodvinsk, where the vessel had been sent to be dismantled.
Reports say the nuclear reactor had already been removed.
The Viktor class submarine arrived at the yard in June and the work was due to be carried out using funds from Canada, Interfax reported.
The Associated Press said the fire caused by the blast was extinguished after nearly four hours.
Oleg Frolov, chief engineer for the shipyard, told Russian NTV that there was no danger of radioactive contamination from the incident.
Igor Grigoriyev, a spokesman for the Emergency Situations Ministry in the region, said a welding torch apparently ignited fuel vapours that had built up in one compartment of the submarine, according to AP.