KIEV, May 27 – The period of pre-arbitration settlement of the dispute between Naftogaz Ukraine and JSC Gazprom expires on May 29 and Russia is acting unconstructively, but there is still a chance the two gas companies can sign an agreement, Ukrainian Prime Minister Arseniy Yatseniuk said.

"If Naftogaz and Gazprom do not sign an appropriate agreement, which will meet the pre-arbitration claim [by Ukraine] by May 29, it means we will be seeing Russia's Gazprom in court," Yatseniuk said at a Cabinet meeting on Tuesday.