Iranian Foreign Minister Abbas Araghchi, meanwhile, said Tehran was prepared for the conflict to resume, even if it escalated into what he called a “doomsday war”.

“We stand firm in the face of any new aggression, even if it comes to a doomsday war,” Araghchi told NBC’s Meet the Press on Sunday.

US Ambassador to the United Nations Mike Waltz described Tehran’s proposal as a “pretty cynical attempt” to obtain sanctions relief, end the US blockade of Iranian ports and gain access to billions of dollars in frozen assets.

Waltz said Washington lacked confidence in Iran following what the US considers violations of an earlier understanding, including attacks on international shipping.

He added that Trump would keep military options available and said any agreement must address Iran’s highly enriched uranium and its ability to resume enrichment.

The Strait of Hormuz remained a major flashpoint after Iran’s Fars news agency, which is affiliated with the Islamic Revolutionary Guard Corps, reported that Iranian forces targeted 19 vessels over Friday and Saturday.

According to Fars, 12 vessels were targeted on Friday night and seven more on Saturday after attempting to cross outside routes authorised by Tehran.

The agency did not identify the vessels or provide details of their flags, cargoes or destinations. The claims have not been independently verified, and the reports do not establish whether the ships were damaged, detained or forced to turn back.

Iranian authorities have warned shipping companies against using routes they consider unauthorised, threatening restrictions on vessels associated with non-compliant operators.

However, claims that the waterway is completely empty should be treated cautiously.

US Energy Secretary Chris Wright said on Sunday that oil flows through Hormuz were averaging nearly 13 million barrels a day, with more than 20 million barrels passing through on one day last week. The figures indicate that substantial oil volumes continue to move despite the security risks.

The IRGC also said its navy had seized a second US underwater vehicle in the Strait of Hormuz.

IRGC spokesman Hossein Mohebbi identified the device as an Mk 18 Mod 2 Kingfish autonomous underwater vehicle and described it as a technological and intelligence prize.

The claim was reported by Iran International. The announcement, by itself, does not establish the circumstances of the alleged seizure or independently verify Iran’s account.

Canada’s Foreign Minister Anita Anand said Iran’s threats to navigation rights in Hormuz were a direct affront to international law.

In remarks to the United Nations General Assembly on September 26, Anand said Canada regarded Iran as a major threat to regional peace and security and insisted it must never acquire a nuclear weapon.

She said Canada would use available measures, including targeted sanctions, and expressed support for Gulf and European partners condemning Iranian attacks in the region.

Canada announced additional sanctions on five Iranian individuals and five entities on September 23, citing their alleged roles in repression and human rights violations.