Work on a North Sea platform has been suspended and non-essential crew are being removed because of a suspected oil leak.
TAQA, operators of Cormorant Alpha off Shetland, said hydrocarbons were detected in one of the platform's legs.
Since the discovery on Monday, the installation and all pipeline infrastructure have been shut as a precaution and a technical team is investigating.
A statement by the Abu Dhabi energy company said: "There are 159 people on board and our number one priority is the safety and well-being of our people. All those on board have been accounted for and they are all safe and well.
"We have stopped all non-essential work on the platform to focus all our efforts on addressing this issue. As a precaution, we will be taking all non-essential crew off the installation. This will be done by scheduled helicopter flights throughout the day."
Cormorant Alpha handles around 90,000 barrels of crude oil per day, of which 42,600 are produced by TAQA.
The platform is 94 miles from Lerwick.