Top Iranian and US negotiators will resume talks on Sunday to address disputes over Tehran’s nuclear program, in a push for progress as Washington hardens its stance ahead of US President Donald Trump’s Middle East visit.

Axar.az reports, citing Reuters, Iranian Foreign Minister Abbas Araghchi and Trump’s Middle East envoy Steve Witkoff will hold the fourth round of talks in Muscat through Omani mediators, despite Washington taking a tough stance in public that Iranian officials said would not help the negotiations.

Witkoff told Breitbart News on Thursday that Washington’s red line is: “No enrichment. That means dismantlement, no weaponization,” requiring the complete dismantling of Iran’s nuclear facilities in Natanz, Fordow, and Isfahan.

“If they are not productive on Sunday, then they won’t continue and we’ll have to take a different route,” Witkoff said in the interview.

Reacting to Witkoff’s comments, Araghchi said on Saturday that Iran would not compromise on its nuclear rights.

“Iran continues negotiations in good faith ... if the aim of these talks is to limit Iran’s nuclear rights, I state clearly that Iran will not back down from any of its rights,” Araghchi said.