The Batkivschyna faction in Ukraine's Verkhovna Rada headed Yulia Tymoshenko has filed lawsuits to the district administrative court against Ukraine's Cabinet of Ministers and the National Commission for Energy, Housing and Utilities Services Regulation (NCER) over the unlawful increase of housing and utilities tariffs for households.

"This will be two lawsuits. One is against Groysman's Cabinet [Ukrainian Prime Minister Volodymyr Groysman] and the second is against the National Commission for Energy, Housing and Utilities Services Regulation," Tymoshenko told reporters in Kyiv on Thursday.

She said that the lawsuit against Groysman's government concerns the unjustifiable and unlawful prices of gas and against the NCER – the absolutely unjustifiable and unfair heating and hot water tariffs.

Tymoshenko said that Ukrainian legislation and Constitution do not give the government the right to set gas prices.

"Let's think: they all say that we have market gas prices. If we have market gas prices, why should they pass a cabinet resolution that sets the market gas price? The market sets prices, not the cabinet resolution," she said.

"The NCER had no right to set heating and water tariffs. This is competence of local authorities," she said.

"Sooner or later Groysman and Yatseniuk will have to answer for setting the price for Ukrainian gas at 5-6 times of its cost of production with profit," she added.