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State-run news agencies have warned the fire is spreading and is currently covering 120 square metres of the huge ship. The ship, currently docked in the Arctic port of Murmansk, caught fire during routine repairs. At least one person are unaccounted for, TASS news agency has warned.

One source told the TASS the fire had started on the upper deck and that thick, black smoke was billowing from the vessel.

A source in the Emergency Ministries: “Three people were injured in a fire that broke out onboard Russian aircraft carrier Admiral Kuznetsov at a dock in Murmansk, northwest Russia.

"Three people have been injured. All of them are receiving medical assistance.”

TASS said eight people were rescued and one person was missing.