Prime Minister Yulia Tymoshenko said on Wednesday that Ukraine would make full payment on time for gas imported from Russia in June, according to Reuters.

"We are putting gas into storage in Ukraine according to plan. We did so in April and May and made 100 percent payment," Tymoshenko told a news conference broadcast on television.

"In June, we have again put into storage 1.1 billion cubic metres. And we will again pay for it without fail."