An energy company in Slovakia said it recorded a drop in the amount of Russian natural gas headed its way through the Soviet-era transit network in Ukraine.

A spokesperson from the gas importer known by its Slovakian initials SPP said there's been a steady drop in gas coming through Ukrainian territory.

"On Sunday, SPP recorded a 10 percent decrease in Russian gas supply," the spokesperson told Russian news agency RIA Novosti.

Gazprom meets about a quarter of European gas needs, though most of that runs through Ukraine's pipeline network.

Ukraine was cut off from Russian gas because of lingering debt issues. In August, testing began to send 70 million cubic feet per day from Slovakia to Ukraine through the joint work of transit companies Uktransgaz and Eustream.

Gazprom last week said that, while it's putting a greater emphasis on the growing Asian market, Europe is the prime destination for Russian gas.

The company said Russian gas would account for 64 percent of European imports this year, up 17 percent from four years ago.