Oil spill from Taqa Bratani's Tern platform off Shetland
A large spill of oil happened at a platform off Shetland this week, BBC Scotland has learned.
Twenty-three tonnes of oil was discharged from the Tern platform, 100 miles from Lerwick, on Tuesday.
It is not being treated as an ongoing incident as the spill is understood to have been dispersed by rough weather in the area.
The platform is operated by Taqa Bratani, a subsidiary of the Abu Dhabi National Energy Company.
The Department of Energy and Climate Change said the incident was being attributed to process problems rather than drilling and did not involve a deep-sea installation.
A spokesman said investigations into the incident were taking place.
Labour's Shadow Energy Minister Tom Greatrex said the department must ensure there was no lasting environmental damage.
He added: "It is concerning that news of the spill is only coming to light now, four days after the incident happened.
"The government must be fully transparent about what caused the spill, and the steps it has taken to resolve the matter."