Two people were killed and one injured in a fire that occurred on board the Vaygach nuclear icebreaker in east Siberia’s Krasnoyarsk Territory early on Thursday, a local Emergencies Ministry department spokesman said.

“The fire has been extinguished,” spokesman Alexander Yakimov said.

Yakimov said there was no threat to the icebreaker’s nuclear reactor. A spokesman for the Rosatom state nuclear corporation said there was no radiation leak due to the fire.

The reasons for the fire are being established. An investigation is underway.

The 50,000-hp Vaygach was built at a Finnish shipyard on an order from the Soviet Union. It was commissioned in 1990.