Gazprom said on Saturday it could not pump additional gas to Western Europe amid a cold snap, after EU officials said the Russian giant's deliveries had dropped in several countries.

"Gazprom at the moment cannot satisfy the additional volumes that our Western European partners are requesting," the company's deputy chairman Alexander Kruglov said at a meeting with Prime Minister Vladimir Putin, according to Russian news agencies.

Putin told Gazprom at the meeting that the demands of Europe had to be respected but the firm's priority was to supply consumers in Russia, which is also enduring a spell of very cold weather.

"I ask you to make efforts to meet the demands of our foreign partners, bearing in mind that the prime task of Russian energy firms and Gazprom in particular is to satisfy the internal demand in Russia," said Putin.

"This is the priority task."

Kruglov said that Gazprom was carrying out deliveries in line with its agreements with European states but that it was unable to pump additional gas that had been requested.

He said there had been a reduction of 10 percent in gas volumes delivered on previous days but that now deliveries had returned to their normal levels.

The European Commission said Friday that Austria, Bulgaria, Germany, Greece, Hungary, Italy, Poland, Romania and Slovakia had each registered drops in gas supplies.

But a spokeswoman for EU energy commissioner Guenther Oettinger, Marlene Holzer, said that Gazprom contractual small print with European buyers "allows for a certain flexibility."