The Antimonopoly Committee of Ukraine opened a case against DTEK Zakhidenergo a few days before.
The first step will be a test supply of electricity to Croatia.
Bulgaria so far provides itself with Russian gas.
The Committee stated the need for legislative changes.
Electricity imports from Hungary and Belarus have grown.
Gas prices with a supply on weekends were at the level of 10.013 €/MWh at one of the leading hubs, TTF.