Russia has warned that a price dispute with Ukraine could cause it to cut oil deliveries to three EU countries, Slovakia has said.

斯洛伐克称，俄罗斯与乌克兰的价格纷争可能导致其中断对欧盟三个国家的石油传送。

A Russia-Ukraine gas dispute last January cut supplies to Europe

Energy deliveries to Slovakia, Hungary匈牙利 and the Czech Republic捷克共和国 would be disrupted中断，分裂 by the cut, it added.

The Slovak government said it had received the warning via the European Union, which said it had been informed of the possible cut by Moscow.

The country's security council has met to discuss the warning.

Slovak Prime Minister Robert Fico and Economy Minister Lubomir Jahnatek are expected to hold a news conference about the emergency meeting.

Brussels was monitoring the situation, an EU official said, adding that there was no cause for concern as the three EU countries potentially affected¹ had sufficient reserves.

'Unresolved problems'

Russia had announced "the possibility of suspending oil supplies to... Slovakia, Hungary and the Czech Republic", Slovakia's government said, quoting a letter from the European Commission.

"The reason is allegedly unresolved未解决的 problems between the Russian Federation² and Ukraine concerning oil transit³."

Nikolai Tokarev, head of Russian pipeline⁴ company Transneft, was quoted by the Reuters路透社 news agency as saying Ukraine had demanded higher payments for the transit of Russian oil.

Moscow agreed to ease the terms under which it supplies gas to Ukraine last month after talks between Russian Prime Minister Vladimir Putin and Ukraine's Yulia Tymoshenko.

Moscow said that deal should prevent disruption - last January, many countries in Europe were left short of gas due to a payment dispute between Moscow and Kiev基辅.

Russia provides about a quarter of the gas consumed in the EU and 80% of that is piped through Ukraine.