Russia's Sibur says had no direct dealings with Wilbur Ross

MOSCOW (Reuters) - Russian petrochemical holding Sibur said on Monday it had no direct dealings with U.S. Commerce Secretary Wilbur Ross and that its ties to its partners were not in breach of sanctions imposed on Russia over the Ukraine crisis.

Sibur was commenting on reports that Ross has kept investments in Navigator Holdings, a shipping firm which has supplied services to Sibur. Stakeholders in Sibur include an associate of Russian Vladimir Putin who is subject to U.S. sanctions.