Gazprom controls the flow of gas through its pipelines into Ukraine from central Asia.

It has blocked these flows for 15 years and if it does not approve them, the head of Ukraine's state gas company Naftogaz Ukraine said he is ready to appeal to the European Union's competition authorities and take the Russian energy giant to international arbitration, according to the newspaper https://on.ft.com/3vlDpRc.

(Reporting by Kanishka Singh in Bengaluru)