A group of parliamentarians, including some members of coalition factions People's Front and Petro Poroshenko Bloc, have asked Ukrainian Prime Minister Volodymyr Groysman to urgently inspect the financial and economic operations of national joint-stock company Naftogaz Ukrainy and its subsidiaries and suspend Board Chairman Andriy Kobolev from duty.

"Two weeks ago the prime minister held a meeting. The minutes of the meeting included the instruction to check Naftogaz, but unfortunately they disappeared," one of the initiators MP from People's Front faction Maskym Poliakov said at a briefing in the Verkhovna Rada on Thursday.

He said that at present the investigation into three criminal cases opened against operations of Naftogaz and Kobolev by law enforcement agencies is being blocked.

Among other accusations against Kobolev and Head of its subsidiary Ukrgazvydobuvannia Oleh Prokhorenko, which were also presented by independent MPs Vitaliy Kupriy, Mykhailo Holovko and the Deputy Control inter-factional group, high salaries with an exclusive social package, the alleged increase of gas tariffs and alleged secret talks with Gazprom.

Kobolev was accused of refusing from purchase of gas in Q2 2016 and then buying it at the price that was $30-40 higher. The loss is estimated at around UAH 3 billion.

The lawmakers accused Ukrgazvydobuvannia of avoiding inspections by the State Audit Service.