US Threatens to Halt Ukraine Arms Over Refinery Strikes, Straining Trump's Russia Diesel Deal

US officials have told European capitals and Kyiv that continued Ukrainian attacks on Russian oil refineries could cost Ukraine American weapons, according to the Financial Times. The pressure follows a diesel agreement Trump reached with Russian President Vladimir Putin, which the administration appears keen to protect from disruption. The arrangement has already drawn domestic criticism. A prominent Republican senator said the Russian diesel deal may be illegal, adding a legal dimension to what was already a contentious piece of diplomacy. Separately, the FT reported that Ukrainian strikes have caused the worst petrol shortages in Russia since the Soviet collapse, even though diesel supplies have held up, raising questions about whether Moscow can actually meet the terms Trump negotiated. What remains unresolved is whether Washington will follow through on the arms threat, and how Kyiv would respond if its primary leverage against Russian energy infrastructure were taken off the table. The outcome will shape both the war's trajectory and global diesel and refined-product flows.