"The meeting took place at GMT 0900 at the headquarters of the institution and has ended by now," the sources added.
The Ukrainian officials led by Ambassador Markiyan Kulyk to Romania presented the gas crisis situation and the way in which the Ukrainian transit system to Europe is functioning, without giving any solution on resuming gas supply to EU countries.
"They hope the situation is solved as soon as possible as they are equally affected. They grounded their actions and hope to quickly reach a transit agreement with the Russian Federation as they currently lack one," the people attending the meeting said.
Valeriu Turcan, spokesperson of Romanian President Traian Basescu, said Tuesday Russian Prime Minister Vladimir Putin called up the Romanian head of state to offer him more information on the gas supply situation.
Russia resumed natural gas supplies on Tuesday after international monitors were placed along the pipeline route through Ukraine under an agreement reached with the EU, only to shut them off again several hours later.
Gazprom accused Ukraine of blocking the gas, while Ukraine countered that the Russian energy giant had deliberately routed the gas in a way that made it impossible for Ukraine to pump it on to European consumers.
Ukrainian President Viktor Yushchenko said energy officials explained they would have to cut internal gas supplies to four regions in order to allow the Russian gas to transit.