A nuclear submarine being scrapped caught fire on Friday at the Zvezdochka shipyard in northern Russia's city of Severodvinsk, but there is no radiation danger, the city administration said.

"A fire started in the hold of the third compartment of the K-480 Ak Bars nuclear submarine. The submarine is being scrapped, nuclear fuel has been removed from the reactor. There is no radiation danger for the population," it said in a statement.

No one was reported injured.

Up to 70 people are involved in the effort to put out the fire.