A Norwegian Navy frigate was rammed by a tanker while it was docked in a harbor on the country's west coast Thursday, the military said.
The Navy fears that the frigate will slip off the rocks and sink, with tugboats trying to keep it in place under the watchful eye of several Navy vessels.
Update: 0700 UTC - according to latest reports frigate was taken to shallow waters to avoid sinking, water ingress is incontrollable.
Seven people were lightly injured in the collision in the Hjeltefjord near Bergen in the early hours of Thursday, rescuers say.More news: 'He died a hero:' Sheriff's sergeant dies in California bar mass shooting
Eirik Walle, of Norway's rescue centre, told Norwegian news agency NTB the collision smashed a hole in the side of the warship. The frigate was lying in the water nearly on its side with its stern under the water.
The shipping site Sysla said the tanker had been loaded with crude oil and was being towed out of the harbor when it somehow rammed the frigate.
Sture, a major export oil terminal, was shut down temporarily as a precautionary measure.
The KNM Helgeelge Ingstad had been returning from North Atlantic Treaty Organisation military exercises.
The Navy quickly evacuated all the crew except for 10 essential staff members to prevent a possible fuel leak.More news: Officials order evacuations as Camp Fire threatens Northern California
The tanker was not damaged, and its 23-strong crew remains onboard, according to AP.
No oil spill has been reported from the tanker, which was sailing from Equinor's Sture terminal in Øygarden.
Rear Admiral Stensoenes said the cause of the accident was not clear and the Navy would wait for the findings of Norway's Accident Investigation Board.
The 134-meter-long (440 foot) frigate was returning to its home port of Haakonsvern, southwest of Bergen, when the incident occurred.
The Trident Juncture 18 live drills concluded on November 7 in Norway.More news: Alberto Gonzales 'profoundly concerned' over choice of new acting U.S. AG
The ship had previously been part of an escort convoy which seized chemical weapons from Syria back in 2013.