DOONBEG, Ireland — President Donald Trump on Sunday urged Ukraine to stop attacking Russian oil refineries and other facilities that produce diesel, as fuel prices climbed worldwide. Trump made the remarks while visiting his golf resort in County Clare during a two-day trip to Ireland. U.S. diesel prices surpassed $6 per gallon on Friday, according to reported market data, amid disruptions to oil shipments from the Middle East and damage to Russian energy infrastructure. “Mr. Zelenskyy has to do one thing. He has to stop knocking out diesel fuel in Russia,” Trump told reporters, referring to Ukrainian President Volodymyr Zelenskyy. Trump said Ukraine could continue striking other military targets but should avoid facilities tied to diesel production because, in his view, the attacks were contributing to a worldwide shortage. Trump rejected the idea that the U.S. war with Iran was responsible for the price surge. He said his administration had asked Zelenskyy to halt attacks on Russian diesel-producing sites and argued that the fuel market disruption was instead being driven by the war between Russia and Ukraine. Ukraine has increasingly used long-range drones and missiles against Russian refineries and other energy facilities. Kyiv has described such strikes as part of its effort to raise the cost of Russia’s full-scale invasion, now in its fourth year, and to pressure Moscow during negotiations. A senior European official involved in U.S.-brokered discussions between Russia and Ukraine challenged Trump’s account and accused his administration of shifting blame ahead of the U.S. midterm elections scheduled for Nov. 3. The official, who spoke anonymously about sensitive negotiations, said Russian diesel and oil exports have historically played only a limited role in U.S. fuel consumption. “If Washington wants Ukraine to stop attacking Russian refineries, it should persuade Moscow to stop attacking Ukraine’s energy grid,” the official said, arguing that an energy ceasefire would have to be mutual. Trump’s comments followed similar claims from members of his administration. Energy Secretary Chris Wright said last week that damage to Russian refineries had contributed to difficult diesel conditions. Treasury Secretary Scott Bessent also described the United States as facing an energy shock and cited Ukrainian attacks on Russian energy assets as one factor. Russia, meanwhile, has continued attacking Ukraine’s energy infrastructure. Foreign Minister Sergey Lavrov said Saturday that Moscow remained open to negotiations but would not suspend its military operations while talks were underway. For consumers and businesses, the dispute comes as higher diesel costs threaten to increase transportation, farming and heating expenses. The competing explanations also underscore the political stakes of fuel prices as Washington seeks to manage the consequences of the Iran conflict while pressing for progress in talks over Russia’s invasion of Ukraine.