Naftogaz Ukrainy has once said Gazprom's statements on the state holding's debt for gas allegedly delivered by the Russian company to the temporarily occupied territory of Donetsk and Luhansk regions are false.

Naftogaz said in recent years purchase of gas from Gazprom has been carried out exclusively on the terms of advance payment.

At the same time, Naftogaz since November 2015 has not bought and has not paid for gas from the Russian company, and prior to that imported gas exclusively through the points of the gas transportation system (GTS) located in the territory controlled by Ukraine.

Naftogaz does not accept gas under the contract with Gazprom at the gas metering stations of Prokhorivka and Platove. All mutual claims that arisen within economic relations between Naftogaz and Gazprom have to be resolved through arbitration," Naftogaz said.