KYIV, June 7 – Naftogaz Ukrayiny CEO Andriy Kobolev suspects that Gazprom's statement on the readiness to lower the price of gas for Ukraine contains unacceptable conditions and insists on a trilateral format of negotiations with the participation of representatives from the European Union.

"We are always ready for negotiations, but only in a trilateral format. Any new contracts must be signed on the basis of European norms and with respect for the decisions of international arbitrations," he wrote on his Facebook page.