KIEV, Ukraine (AP) — Russia has shut off all its gas supplies to Europe through Ukraine — the latest move in a pricing dispute that has reduced or halted fuel deliveries to a dozen countries during a winter cold snap.

Russia’s gas monopoly Gazprom, which had sharply limited supplies through Ukraine on Tuesday, has stopped all gas shipments through the country as of 7:44 a.m. (0544 GMT), said Valentyn Zemlyansky, spokesman for Ukraine’s Naftogaz.

About 80 percent of Russian gas to Europe is shipped via Ukraine. Other smaller pipelines run through Belarus and Turkey.

“It was the Russian side’s decision to stop all gas deliveries to Europe” through Ukraine, Naftogaz head Oleh Dubina told reporters. “I think it is inappropriate.”

Russia confirmed the cutoff, but said it was Ukraine’s fault because it had shut down the last pipeline carrying gas from Russia. Gazprom also says it is reducing to compensate for the gas it accuses Ukraine of diverting.