Russian oil supplies to Hungary and Slovakia could be suspended for at least five days after a Ukrainian strike on a facility in Russia, Hungarian and Slovakian officials said on Friday, in a widening of the fallout of Russia's war in Ukraine.

Russia and Ukraine have stepped up attacks on each other’s energy infrastructure, hitting Ukrainian domestic heating supplies, Russia’s Druzhba pipeline and other facilities, over the past few weeks as US President Donald Trump has pushed for a deal to end the conflict.

Repeated Ukrainian military strikes on infrastructure have underscored Hungary’s heavy dependence on Druzhba. Currently, 58 percent of the country’s oil — about 5.7 million tons annually — arrives via the line to the refineries in Szazhalombatta and Bratislava.