The Department of Energy and Climate Change echoed that assessment in a statement issued Monday.
Scottish Environment Secretary Richard Lochhead said government officials are continuing to monitor the leaking pipe, which is located about 180 kilometers (some 110 miles) east of Aberdeen.
"As is standard practice in incidents such as this, the UK government, which has responsibility for the pipeline system, will be taking forward an investigation and I will be pressing for the Scottish government to have a full and formal role, given our responsibilities for the marine environment," Lochhead said in a statement.
The leak is small compared to the Gulf of Mexico oil spill in the United States in 2010, but is substantial for the region, the Department of Energy and Climate Change said.
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