KIEV, May 11 – Naftogaz Ukrayiny expects that the Arbitration Institute of the Stockholm Chamber of Commerce will make a decision in the Gazprom gas contract case in May, Naftogaz Commercial Director Yuriy Vitrenko said.

"We expect that the arbitration tribunal to make the decision on the gas supply contract case in May. It is likely that the delay is linked to the fact that the tribunal required more time to make the decision," he wrote on his Facebook page.

Vitrenko said that he cannot disclose other details.