This month the head of the EBRD said the bank could invest hundreds of millions of dollars in Ukraine's energy sector this year, but that any investment would depend on Kiev implementing long-promised energy sector reforms.

Ukraine expects to store enough natural gas for next winter despite cutting off imports from Russia and Russian flows crossing the country destined for Europe will not be disrupted, Energy Minister Volodymyr Demchyshyn said on Thursday.

Russian natural gas producer Gazprom put Ukraine's total gas debt at almost $29.5 billion on Thursday, ratcheting up pressure in a gas pricing dispute with the country, which is fighting a pro-Moscow rebellion on its eastern outskirts.

Naftogaz's role is the creation of an efficient gas market in Ukraine.

Imports from the European Union (EU) will drop because Russian gas is now competitive, according to state-run NAK Naftogaz Ukrainy. Flows from Slovakia, the EU’s biggest supplier to Ukraine, may fall by a quarter from May, Tomas Marecek, the chairman of Slovak grid operator Eustream, said.

Ukraine is facing a huge energy-security challenge. It is dependent on Russia supplying most of its natural gas as well as uranium fuel for its nuclear reactors.

The Russian government is requesting that state-owned gas giant Gazprom provide discounted gas to the struggling government in Ukraine.

Ukraine is facing existential challenges, and energy security is one of them. The country is dependent on Russia supplying most of its natural gas as well as uranium fuel for its nuclear reactors. Under these very difficult circumstances, a government with a holistic view of its strategic security and energy goals would logically develop a policy aimed at encouraging increased domestic oil and gas production. Unfortunately, Kyiv is doing the opposite.

The International Monetary Fund on Wednesday approved a bigger, high-risk bailout for Ukraine, giving Kiev immediate access to $5 billion of $17.5 billion in emergency IMF credit in another bid to keep the embattled country afloat.

The European Union should share the cost of filling Ukraine’s natural-gas storage if it wants to prepare for worst-case scenarios next winter, the country’s energy minister said in an interview, highlighting a potential clash in coming negotiations between the EU, Kiev and Moscow.