The combo of photos of the 14 crew members who died in a fire on a Russian navy's deep-sea research submersible, distributed on July 4, 2019, by Russian Defense Ministry Press Service, shows from a top row: Captain 1st rank Denis Dolonsky, Captain 1st rank Nikolay Filin, Captain 1st rank Vladimir Abankin, Captain 1st rank Andrei Voskresensky, Captain 1st rank Anatoly Ivanov, Captain 1st rank Denis Oparin, Captain 1st rank Konstantin Somov, Bottom row: Captain 2nd rank Alexander Avdonin, Captain 2nd rank Sergei Danilchenko, Captain 2nd rank Dmitry Solovyov, medical service Colonel Alexander Vasilyev, Captain 3rd rank Viktor Kuzmin, Captain 3rd rank Vladimir Sukhinichev, Lt. Captain Mikhail Dubkov. The Defense Ministry said the 14 seamen were killed by toxic fumes from the blaze. (Russian Defense Ministry Press Service via AP)

MOSCOW (AP) — Russian President Vladimir Putin has awarded the nation's highest honors to 14 seamen who died in a fire on one of the navy's research submersibles.

Putin's decree published Friday posthumously awarded four naval officers with the Hero of Russia medals and the others with the Order of Courage.

The military said the victims were killed by toxic fumes during Monday's blaze. Some others survived the fire, but the military hasn't given their number.

Defense Minister Sergei Shoigu reported to Putin Thursday that the vessel's nuclear reactor wasn't damaged by the fire and would be put back in service following repairs.

He didn't name the ship, but Russian media reported it as the country's most secret submersible, the Losharik.

Navy sailors light candles during a religion service to commemorate the crew members that were killed on one of the Russian navy's deep-sea research submersibles at Kronshtadt Navy Cathedral outside St.Petersburg, Russia, Thursday, July 4, 2019. Some crew members survived a fire that killed 14 sailors on one of the Russian navy's deep-sea submersibles, Russia's defense minister said Wednesday without specifying the number of survivors from the blaze. (AP Photo/Dmitri Lovetsky)
Navy sailors attend a religion service to commemorate the crew members that were killed on one of the Russian navy's deep-sea research submersibles at Kronshtadt Navy Cathedral outside St.Petersburg, Russia, Thursday, July 4, 2019. Some crew members survived a fire that killed 14 sailors on one of the Russian navy's deep-sea submersibles, Russia's defense minister said Wednesday without specifying the number of survivors from the blaze. (AP Photo/Dmitri Lovetsky)
Russian President Vladimir Putin, left, listens to Russian Defense Minister Sergei Shoigu during their meeting in the Kremlin in Moscow, Russia, Thursday, July 4, 2019. Some crew members survived a fire that killed 14 sailors on one of the Russian navy's deep-sea submersibles, Russia's defense minister said Wednesday without specifying the number of survivors from the blaze. (Mikhail Klimentyev, Sputnik, Kremlin Pool Photo via AP)