US President Donald Trump should curb his “theater diplomacy” as it will not work with Iran, Tehran’s top negotiator, Mohammad Bagher Ghalibaf, has said.

Trump announced on Saturday that he had called off a planned attack on Iran, which, according to him, would have been on a scale “not seen since World War II.” He claimed that he made the decision because Washington and Tehran were close to reaching a diplomatic solution to the conflict in the Middle East.

In the following days, the US president insisted that the two sides were “having very good discussions,” but warned that Iran would be “hit very hard” if the Strait of Hormuz, through which around one-fifth of the world’s seaborne oil passes, was not reopened “very soon.” Tehran has repeatedly denied holding any direct negotiations with the Americans.

Ghalibaf took to X on Thursday to berate Trump’s approach to dealing with Tehran. “‘Massive attack coming… wait, never mind, they want to negotiate’. That’s theater diplomacy on loop,” he wrote.

The negotiator insisted that “using bullying + broken promises + fake news as leverage is a failed strategy.”

Ghalibaf advised Trump to instead “acknowledge the facts and fulfill your commitments. We don’t need more theater.”

Fighting between the Americans and the Iranians resumed last month after a dispute over control of the Strait of Hormuz derailed a 14-point memorandum of understanding (MoU) that had established a temporary ceasefire and required Tehran to unblock the key waterway in exchange for Washington lifting its blockade of Iranian ports and relaxing sanctions.

The MoU had been intended to pave the way for a permanent settlement of the conflict, which began with a US-Israeli attack on Iran in late February.

On Thursday, Iranian Foreign Ministry spokesman Esmaeil Baghaei told reporters that negotiations with Oman on resuming commercial shipping in the Start of Hormuz were “nearing completion.” The two countries with access to the waterway have agreed on the routes and are in the final stage of drafting a joint statement, provided “certain third parties do not obstruct the process,” Baghaei said, in an apparent reference to Washington.

Tehran stressed earlier that a deal between Tehran and Muscat would “not mean the reopening of the Strait of Hormuz,” with the resumption of traffic depending on the US fulfilling its commitments under the MoU.