The Trump administration is threatening to disrupt a NATO-backed program supplying Ukraine with American weapons as Washington pushes Kyiv to stop strikes on Russian oil refineries and other energy facilities, according to a Financial Times report published Sunday.

European officials briefed on discussions with American officials said Washington contacted European governments and Ukrainian representatives over the weekend, warning that it could suspend intelligence sharing and interfere with the Prioritized Ukraine Requirements List, known as PURL. The White House declined to confirm or comment on the reported calls.

“They are calling Kyiv ... they are calling everyone [in Europe],” one official contacted by a U.S. defense official told the Financial Times.

PURL is a NATO-managed initiative through which allied countries finance purchases of American-made weapons for Ukraine. The United States does not contribute financially to the program, but Washington could still affect its operation by restricting access to weapons or other forms of support.

American officials also reportedly contacted Pavlo Palisa, a military adviser to Ukrainian President Volodymyr Zelenskyy and a former general with Ukraine’s 93rd Mechanized Brigade.

The reported warnings come as President Donald Trump seeks to stop attacks on energy infrastructure in both countries. Trump announced Sunday that Russia and Ukraine had agreed to an immediate ceasefire on strikes against energy facilities, an announcement that reportedly caught Ukrainian and European officials by surprise.

Zelenskyy welcomed Trump’s announcement but questioned whether Moscow would honor the agreement. He pointed to continued Russian attacks across Ukraine, including drone operations, glide-bomb strikes and attacks on energy infrastructure.

The Ukrainian president said Russian Shahed drones continued operating over the country throughout Sunday. He also reported that Russian forces struck a power plant in the eastern Ukrainian city of Kharkiv that evening.

Zelenskyy accused Russian President Vladimir Putin of repeatedly rejecting Ukrainian proposals intended to reduce hostilities.

“Ukraine has proposed many de-escalatory steps. Putin had one answer to all of them — ‘nyet’ [no],” Zelenskyy said.

The competing claims highlight the challenge facing the Trump administration as it attempts to secure an end to attacks on energy infrastructure while maintaining pressure on both sides to honor a ceasefire. If Washington follows through on the reported warnings, Ukraine could face additional uncertainty over intelligence support and the flow of American-made weapons financed by its NATO allies.

The White House has not publicly confirmed the reported threats, and the terms and implementation of the announced energy ceasefire remain uncertain.