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Image courtesy of Transneft

A leak from  a major Russian oil pipeline in the Black Sea caused an unknown quantity of oil to spill Wednesday near the southern port of Tuapse.

Russia’s emergency ministry confirmed that a spill did occur but did not comment on the size of the discharge.

Transeft, Russia’s largest transportation player, said the pipeline was shutdown after the leak was reported.

The name of the affected pipeline has not been disclosed.

Emergency crews are working to deploy temporary floating barriers but stormy weather is currently hampering containment efforts, Reuters said.

The cause of the leak is still unknown.

The pipeline supplies Rosneft’s Tuapse refinery, located about 73 miles from Sochi.

“I can’t say it is fully covered in oil but there is plenty of oil in the port and on berths, not to mention the coast line,” an unnamed refinery worker told Reuters.

Rosneft said it is drawing crude from its stock and work at the 32.2 million barrel per year refinery has not been disrupted.