The company's Clair oilfield, around 46 miles west of Scotland's Shetland Islands in the North Sea, suffered a leak because of a "technical issue" and was shut yesterday.
The leak is about two and a half times smaller than the biggest North Sea spill in recent years, at Shell's Gannet platform off Aberdeen in 2011. However, they were unable to give an accurate amount of oil spilled as of yet.
BP said it was working together with oil spill and environmental experts from BP, Oil Spill Response Limited and the Department for Business, Energy and Industrial Strategy to assess any potential environmental impact and to agree the best way to respond.
Officials estimated about 95 tons of oil, or 700 barrels worth, had spilled into the sea.
Clair Ridge platform topsides being installed
"At present, we believe the most appropriate response is to allow the oil to disperse naturally at sea, but contingencies for the action are being prepared. All personnel have been accounted for and there are no injuries", a BP spokesman said in the emailed statement. The company said the spill seems to be moving away from land at the moment.
Scotland's Environment Secretary Roseanna Cunningham said allowing the oil to disperse naturally is the method least likely to cause harm to an important marine habitat nearby.
The size of the leak is not known, but BP has said that it will ascertain whether it may have caused any harm to the surrounding environment. "Until those questions are answered the platform should remain out of operation".
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