Iran has issued a warning after reportedly learning that the US is planning to resume military action – after also insisting the Strait of Hormuz will remain closed until its conditions are met.
Iran's central military command said in a statement on Sunday that Tehran had received information that the United States was planning to resume action, with the backing of some other countries in the region.
According to Iranian state media, the country's military said any US attack will trigger sustained strikes on US bases and interests in the region.
Iran also warned that regional countries supporting any aggression from the United States would be considered parties to the conflict.
The conflict began in late February after US-Israeli strikes on Iran. A 60-day memorandum of understanding brought an end to the strikes in June, but that expired last month, and there have been tit-for-tat exchanges since.
Strait of Hormuz to remain closed, says Iran
It comes after the semi-official Fars news agency reported Iran's parliament speaker has insisted the Strait of Hormuz will not reopen until Tehran's conditions are met.
Mohammad Bagher Ghalibaf said earlier on Sunday that Iran must both fight and negotiate, stating Tehran would use both military force and diplomacy.
The strait remains a key sticking point for peace negotiations.
The US, which is blocking Iranian ports, has often claimed to have seized control of the waterway and insisted it is open.
But it is still largely cut off, and the impact is being seen on fuel prices - with the cost of oil topping $100 a barrel again earlier this month.
Countries condemn Houthi attack on Riyadh
Elsewhere in the region, Egypt, Jordan and Kuwait have said a Houthi attack on the Saudi capital was a violation of international law and a regional security threat.
A pillar of black smoke was seen rising near Riyadh's main airport on Saturday after missile and drone strikes that have since been claimed by the Iran-backed group.
Saudi Arabia said the attack was intercepted and there were no reports of casualties or damage.
In separate statements, Egypt, Jordan and Kuwait said they condemned the attack, as did the Muslim World League, an independent, international organisation comprised of members from various Islamic countries.
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