The warnings came as President Masoud Pezeshkian prepared to travel to New York for the UN General Assembly and regional mediators stepped up contacts with both sides.
Iran would change the “geography of the war” if it came under renewed attack, Revolutionary Guards spokesperson Hossein Mohebbi said Monday, warning that Tehran would also use weapons it has not yet deployed and strike new targets.
“If a new aggression occurs, we will certainly change the weaponry and the geography of the war,” Mohebbi said.
“We will introduce new weapons with new capabilities into the battlefield, and the world will be astonished,” he added.
Mohebbi said Iran was prepared for a prolonged conflict and that its targets in another round would not necessarily be the same as before.
Iran’s armed forces also pledged in a joint statement to make the United States, Israel and their allies “taste the bitterness of further defeats,” while Army Commander Amir Hatami said the military remained on full alert.
New ship attacks in Hormuz
The threat came with tensions still high around the Strait of Hormuz, where two tankers were hit in separate incidents within hours on Monday.
An inbound tanker was struck by an unknown projectile, leaving two crew members with minor injuries, according to the United Kingdom Maritime Trade Operations. The vessel remained under its own power and continued toward its next port.
UKMTO later reported that an LPG tanker leaving the strait had been hit by debris from unknown projectiles. Its crew was safe and no environmental damage was reported. Authorities were investigating both incidents.
Shipping through Hormuz remains far below pre-war levels. Seventeen commodity vessels crossed the waterway over the weekend, down from 37 a week earlier, according to shipping data cited by Reuters. Before the war, about 125 large commercial vessels typically transited the strait each day.
Qatar seeks short-term deal to revive talks
Qatar, meanwhile, said mediators were exchanging proposals between Iran and the United States in an effort to secure a short-term agreement that could reopen negotiations.
Foreign Ministry spokesperson Majed Al-Ansari said Qatari mediators had been discussing proposals for nearly two weeks and traveling between capitals in search of a formula acceptable to both sides. Doha had also received assurances from US officials that Washington wanted an agreement, he said.
Pakistan has also remained involved in efforts to reduce tensions. Interior Minister Mohsin Naqvi met his Iranian counterpart Eskandar Momeni in Tehran on Monday, weeks after Naqvi and Pakistan’s army chief Asim Munir visited Iran as part of Islamabad’s mediation efforts.
Iranian media said the latest visit was focused on bilateral relations and that Naqvi was not carrying a US message. Iran’s Foreign Ministry had earlier said it was unaware of any specific proposal being brought by the Pakistani minister.
Pezeshkian is due to leave for New York on Tuesday for the UN General Assembly, where the Iran-US conflict is expected to feature prominently in diplomatic contacts.
Washington tightens pressure
Washington showed no sign Monday of easing economic pressure while those contacts continued.
Treasury Secretary Scott Bessent said Iranian airlines would effectively be shut out of international operations from September 23 by threatening sanctions against airports and companies that provide them with fuel, landing services or ticket sales.
“If they land, you cannot provide them with fuel, you cannot provide them with landing services, you cannot sell them tickets, or you will be knocked out of the dollar system,” Bessent told CNBC.
The effects were already spreading. Turkish Airlines told Iran International it had suspended all flights to Iran until at least March 2027, while Iraqi government sources said Baghdad would stop Iranian airlines from operating in the country in line with the US measures.
Pezeshkian’s arrival in New York on Tuesday will give mediators another opportunity to test whether the proposals being exchanged can produce a path back to negotiations. The US airline measures are due to take effect the following day.