U.S. President Donald Trump has warned that the United States could launch new strikes against Iran’s civilian infrastructure, signaling a sharp escalation in tensions after declaring that the memorandum of understanding intended to halt the conflict was effectively “over.”

Speaking to reporters during the NATO summit on Wednesday, Trump said he no longer wished to engage with Tehran and suggested military action could resume. “I’ll give a little warning. We’re going to hit them hard tonight,” he said, while accusing Iran of violating understandings reached after weeks of fighting.

The interim ceasefire agreement between Washington and Tehran had created a 60-day window for indirect negotiations aimed at securing a permanent settlement. However, talks held in Qatar ended last week without any significant progress, raising concerns that diplomacy has stalled.

The latest deterioration follows renewed military confrontations in the Persian Gulf. The United States launched fresh strikes after accusing Iran of attacking three commercial vessels in the Strait of Hormuz, a vital global energy corridor. Iran responded with retaliatory strikes targeting Bahrain and Kuwait, further widening the regional crisis.

The heightened tensions have unfolded during the funeral ceremonies for Iran’s late Supreme Leader Ali Khamenei, who was killed earlier this year during the opening phase of the conflict. Large funeral gatherings in Tehran have featured anti-American and anti-Israeli slogans, with some mourners calling for revenge against Trump and Israeli Prime Minister Benjamin Netanyahu.

The collapse of ceasefire efforts has renewed fears of a broader regional conflict that could threaten international shipping, disrupt global energy supplies, and further destabilize the Middle East. Diplomatic observers continue to urge restraint, but with negotiations stalled and military rhetoric intensifying, prospects for a peaceful resolution appear increasingly uncertain.