A fire broke out on Saturday in a naval academy dormitory in Russia's second biggest city, St Petersburg, killing six cadets and injuring 18, the Emergency Situations Ministry said.
The fire erupted early in the morning at the Makarov Naval Academy.
Ministry spokesman Viktor Beltsov said that in addition to the six killed - two of whom died from their burns in hospital - another 18 cadets were hospitalized and 57 evacuated.
Russian state television showed sheets tied together to allow people to escape the fire on the third floor of the five-story building through a window and lower themselves down to jump on to mattresses.
Leonid Belyaev, head of the Emergency Situations Ministry's branch in St Petersburg, said the fire broke out in the corridor and spread to dormitory rooms, where four bodies were found.
There was no immediate information on possible causes of the fire, which Beltsov said was contained within about an hour.