KYIV, March 12 - Naftogaz Ukrayiny and its six subsidiaries filed $8 billion in claims against Russia at the tribunal under the Permanent Court of Arbitration in The Hague for illegal seizure of Crimea, Naftogaz Chief Commercial Director Yuriy Vitrenko said.

"This year we can win up to $8 billion,” he said, adding that “$5 billion was without interest [the amount of the claim], while $8 billion includes the expected interest."