Iran official says support for new sanctions would be ‘act of war’– abcnews.com

The new head of Iran’s top security body warned Sunday that Tehran will see any country’s support for new U.S. economic measures against the Islamic Republic as an “act of war,” while Iran’s president defended a memorandum of understanding with the United States as the best way out of the stalled conflict.

Treasury Secretary Scott Bessent on Monday is expected to announce the new measures after the U.S. vowed to impose an “unprecedented” level of economic warfare and isolation on a country that has lived for decades under sanctions. Also Monday, Pakistan’s army chief is expected to visit Iran as mediators try to revive talks.

Meanwhile, attacks calmed on the Strait of Hormuz but posturing did not, as a recently created Iranian authority listed dozens of vessels it said will face restrictions on future transits.

Here’s a look at the latest developments in the Iran war and the wider Middle East on Sunday. Full coverage can be found here.

The hard-line leader of Iran’s Supreme National Security Council, Mohsen Rezaei, issued his latest warning on X, with the comments quickly shared by Iranian state media.

It came a day after Rezaei’s most extensive public comments since being named to the post this month.

“If (Trump) wants to do something, we will retaliate in a seismic manner,” he had told the state broadcaster in an interview that aired late Saturday. He said Iran would target other oil-shipping routes from the Persian Gulf — alternatives to the Strait of Hormuz.