Iran and US both say they targeted the other's military

Donald Trump says Iran "really wants to make a deal", but sticking points between the US and Iran remain. (WANA: Majid Asgaripour)

The United States says it struck Iranian military sites on the weekend.

Sticking points to a peace agreement remain, including Tehran's demands for the lifting of sanctions and the release of tens of billions of dollars of Iranian oil revenues frozen in foreign banks.

Iran and the United States have again exchanged fire, amid negotiations to end the three-month-old war.

The US said it struck Iranian military sites on the weekend, and Iran's Revolutionary Guard said on Monday it had targeted a US base in response.

The US and Iran have sporadically exchanged strikes since their ceasefire took effect in early April, as diplomacy aimed at a more durable agreement drags on.

Israel has captured a castle in southern Lebanon in a mountainous military siege that marked Israeli forces' deepest incursion into the country in 26 years.

A similar exchange occurred last Thursday and was described in near-identical terms by both sides.

The weekend US strikes on Iran's Gulf coast were in response to "aggressive Iranian actions that included the shootdown of a US MQ-1 drone that was operating over international waters," the US Central Command said in a post on X.

"US fighter aircraft swiftly responded by eliminating Iranian air defences, a ground control station, and two one-way attack drones that posed clear threats to ships transiting regional waters," CENTCOM said, adding it will continue to protect US assets and interests during the ongoing ceasefire.

Iran's Islamic Revolutionary Guard Corps said on Monday it had targeted an air base used by the US in response to the attack on southern Iran, without identifying which base.

Air defences in Kuwait, where a major US base is located, were intercepting missile and drone attacks on Monday as sirens sounded across the country, the state news agency KUNA reported, without providing further details.

The war launched by the US and Israel on February 28 has killed thousands of people, mainly in Iran and Lebanon, and caused global economic pain by pushing up energy prices due to Iran's effective closure of the Strait of Hormuz.

In a late-night social media post, US President Donald Trump did not mention the exchange of hostilities, repeating his as-yet unproven claim that Iran "really wants to make a deal".

He berated critics, including "seemingly unpatriotic Republicans", for negative "chirping" about negotiations to end the conflict.

"Just sit back and relax, it will all work out well