https://www.mercurynews.com/2022/04/27/ukraine-war-russia-cuts-off-gas-to-poland-and-bulgaria/

POKROVSK, Ukraine (AP) — Russia opened a new front in its war in Ukraine on Wednesday, cutting NATO members Poland and Bulgaria off from its gas, a dramatic escalation in the conflict that is increasingly becoming a wider battle with the West.

One day after the United States and other Western allies vowed to speed more and better military supplies to Ukraine, the Kremlin upped the ante, using its most essential export as leverage. It then went even further, saying Russia could halt gas supplies to other European customers.