Russian energy giant Gazprom says it has cut gas supplies to Poland and Bulgaria over their refusal to pay in roubles.
Meanwhile, Bulgaria says it has paid for its April gas deliveries in full already and has accused Gazprom of breaching its contract.
Both Ukraine and the EU say Russia is using energy to try and blackmail countries supporting Ukraine.
The EU is holding emergency gas talks to decide how to respond but says it has contingency plans in place.
Currently, Russia’s ground invasion of Ukraine is slowly making progress, the Institute for the Study of War think tank says
Multiple explosions are heard in the Russian city of Belgorod, about 40km (24 miles) north of the Ukrainian border, with an ammunition depot on fire.
Source: www.bbcnews.com