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.

Ukraine attacked the Druzhba pipeline for the third time, halting oil deliveries to Slovakia and Hungary. The European Commission has not reacted so far, but US President Donald Trump said he was very angry.

Oil is once again flowing to Hungary and Slovakia via the Druzhba pipeline, officials from both countries said late on Tuesday, after a Ukrainian drone strike on an oil pumping station in Russia's Tambov region halted supplies.

Zelensky's move also sparked reactions internationally. President Donald Trump sent Orban a letter calling him a “friend” and expressing disapproval that the Kyiv leadership, funded by the United States, is endangering the energy security of Hungary and Slovakia.

Hungary and Slovakia have issued a joint letter to the European Union sharply criticizing Ukrainian President Volodymyr Zelensky after Ukrainian drones struck the Druzhba oil pipeline — a key energy lifeline for Central Europe.