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High pressure is already building in a region from Scandinavia toward the Kara Sea north of Russia.

The state fisheries agency filed its claim in July saying the spill had polluted lakes, and rivers leading to the Kara Sea.

It then entered Lake Pyasino, which flows to the Kara Sea in the Arctic Ocean.

Some of it has seeped into a lake, connected by a river to the Kara Sea, part of the Arctic Ocean, but local authorities hope to contain it there.

Lake Pyasino serves as the basin for the Pyasina river, which flows to the Kara Sea, part of the Arctic Ocean.