Fire broke out on one of the Russian navy's deep-sea research submersibles, and toxic fumes from the blaze killed 14 sailors aboard, Russia's Defense Ministry said Tuesday, although it released few details about the disaster or the vessel involved. The Defense Ministry did not say how many sailors were aboard the vessel during Monday's fire, whether there were any survivors or if it was submerged at the time. President Vladimir Putin, who came under criticism for his handling of the Kursk nuclear submarine disaster in 2000 that killed 118 sailors, canceled a scheduled appearance and immediately summoned Defense Minister Sergei Shoigu for a briefing on the blaze, which was under investigation.