A major diplomatic row erupted as Ukraine reportedly moved to block Russian oil transit through the Druzhba pipeline to Hungary—allegedly to pressure Budapest into supplying more weapons and financial aid to Kyiv. Hungarian Prime Minister Viktor Orbán lashed out, accusing Ukraine of “blackmail” and warning that obstructing energy flow crosses a red line in EU relations. The dispute underscores deep rifts within Europe over support for Ukraine as energy security and wartime funding collide.