Diplomatic efforts to end the Iran war stalled again over the weekend as both sides dug in on their demands, even as they face mounting pressure to reach a compromise.

Secretary of State Marco Rubio said Iran's nuclear ambitions remain the central issue in any negotiations. In an interview on FNC's "Special Report," Rubio said that Tehran already uses the Strait of Hormuz as an "economic nuclear weapon" and would threaten the entire Middle East if it obtained an actual nuclear weapon.

Abbas Araghchi is holding talks with a Russian delegation on the Iran war, he earlier blamed the US for a breakdown in peace negotiations.

The trip comes as Iranian negotiators seek separate tracks for a deal over the Strait of Hormuz and talks on broader peace, including nuclear issues.

A schoolgirl, an ambulance driver, a migrant worker and a journalist. These are just some of the stories of civilians killed during the Iran War.

Economists say Americans should expect elevated prices at the pump and rising grocery costs in the months to come.

Iran's foreign minister arrived in Russia on Monday, after a whirlwind weekend of diplomacy, seeking to gain political leverage and foreign backing as peace talks with the U.S. remain on hold.

The United States and Iran clashed over Tehran’s nuclear program as a review of the treaty meant to prevent the spread of atomic weapons got underway Monday at the United Nations, a confrontation almost certain to be repeated during the monthlong meeting.