The death toll rose to seven Friday after a gas blast sparked a fire onboard a cargo ship docked for repairs in Russia's European exclave of Kaliningrad, Russian news agencies reported Friday, according to dpa. Three workers were still presumed missing, a Russian navy spokesman Igor Dygalo at the military port was quoted as saying Friday. Investigators blamed the explosion late Thursday afternoon on a "violation of safety rules during repair work on the fuel tank," a source close to the inquiry was quoted by RIA-Novosti as saying. Russian television showed a fire and smoke billowing from the freighter's deck in the military dockyard off the Baltic Sea. Dygalo said the cargo ship belonged to a private St Petersburg company who had leased the docks from the Russian navy in the closed port town near the city of Kaliningrad.
