Norway evacuated all 137 crew members from one of its warships after it collided into a fjord with a Maltese oil tanker.
Eight people were slightly injured in the collision in the Hjeltefjord near Bergen. The KNM frigate Helge Ingstad has been listed dangerously.
The warship had returned from NATO military exercises. The tanker, the Sola TS, has been slightly damaged and it seems that it has not spilled oil.
The accident led to the closure of an important oil terminal and a gas plant.
What do you know about the Thursday incident?
The two ships clashed at 04:00 local time (03:00 GMT) while the frigate was sailing inside the fjords for training, officials say.
The oil tanker had already left the Equinor Sture oil terminal with a cargo of North Sea crude oil, Reuters news agency reported.
"Because of the damage to the frigate he was moved to a safe place," NATO's allied naval command said in a statement.
The tanker, which has a crew of 23, has returned to the port for inspection.
It was not immediately clear what had caused the collision.
What about the economic damage?
The Sture export oil terminal, as well as the Kollsnes gas plant and several offshore oil fields, were shut down as a precaution, but resumed operations on Thursday afternoon, Equinor said in a statement.
The Sture terminal is an important tanker stop, with almost 25% of the Norwegian oil production going through the plant.
Meanwhile, the Kollsnes plant processes gas from various fields for a number of European countries, including the United Kingdom.
It was not immediately known how the temporary closure of the facilities would have an impact on the prices of wholesale gas.
An unnamed official told the AFP news agency that a "small slick" had been detected by the frigate.
"He took a lot of water and there is the real danger that sinks where it is," the official said.