ROME — Talks between Iran and the United States over Tehran’s rapidly advancing nuclear program had appeared ready Monday to leave the Middle East, as an Italian source and others said the next round of negotiations would take place in Rome. However, Iran early today insisted they’d again be held in Oman.

It wasn’t immediately clear where the negotiations would be held after Tehran’s overnight announcement. American officials have not said where the talks would be held. President Donald Trump separately complained Monday about the pace of nuclear talks between the U.S. and Iran as the two countries start a new round of pivotal negotiations.

“I think they’re tapping us along,” he said in the Oval Office during a meeting with El Salvador’s president.

The next meeting had been expected to take place on Saturday in Rome, according to a source in the Italian government who spoke on condition of anonymity to The Associated Press because they weren’t authorized to speak publicly. Italian Foreign Minister Antonio Tajani and Dutch Foreign Minister Caspar Veldkamp also signaled the talks would take place there. And Iranian Foreign Minister Abbas Araghchi reportedly said the talks would happen in Rome, according to the state-run Iraqi News Agency.

Then early today, the state-run IRNA news agency quoted Iranian Foreign Ministry spokesperson Esmail Baghaei as saying the talks would be back in Oman, without elaborating on the reason.