Norwegian frigate Helge Ingstad is understood to be listing heavily after collision with a tanker.
The 127 crew has been evacuated, 8 members of the crew are understood to have suffered injuries.
Eirik Walle, of Norway’s rescue centre, told Norwegian news agency NTB that the collision caused an opening in the frigate’s hull and “it is taking in more water than they can pump out.
Johan Marius Ly of the Norwegian Coast Guard said the 134-meter (442-foot) -long frigate was listing, adding “we have been told that there is a leak from the frigate.
Five ships were ordered from Spanish shipbuilder Bazan at a cost of $2.54 billion.