Fourteen sailors have been killed after a fire broke out on a Russian submarine.
The Russian Ministry of Defence said the blaze erupted while the vessel was performing tests on Monday.
It said the fire was put out thanks to the crew’s "self-sacrifice."
The ministry said the submarine was a “scientific research deep-sea submersible” intended for studying the seabed.
The vessel is now at the Arctic port of Severomorsk, the main base of Russia's Northern Fleet.
It marks the deadliest Russian naval incident since 2008 – when 20 people were killed after a fire-fighting system was set off on a nuclear submarine in the Sea of Japan.
Eight years earlier, the Kursk nuclear submarine exploded and sank during naval manoeuvres in the Barents Sea, killing all 118 crewmembers.
