"Ukraine offers it to Gazprom and European gas traders," Sergii Nykyforov said.

Oleksiy Danilov, secretary of the security and defence council of Ukraine, told a briefing earlier on Friday that Kyiv was ready to increase its annual gas transit to Europe by 55 billion cubic meters from the current 40 bcm provided by the 5-year contact with Gazprom. He did not reveal details.

(Reporting by Natalia Zinets; Editing by Chris Reese)