The warning, posted online by US embassies in Bahrain, Egypt, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia and the United Arab Emirates, came a day after US President Donald Trump threatened to hit Iran "very hard".

US President Donald Trump said late on Saturday he would hold off on a fresh attack on Iran as long as a deal could be reached quickly to halt Iran's nuclear ambitions and reopen the Strait of Hormuz.

United States President Donald Trump announced on his social media account that an agreement for a "complete disarmament" of Hamas had been reached, calling the deal a precedent for the next phases of the 20-point plan for lasting peace in Gaza.

The Palestinian Islamist group's weapons have been one of the key sticking points in implementing a ceasefire deal in place since October.

The reignited hostilities have drawn in the Islamic republic's proxies, and appear to have dashed hopes of a quick return to negotiations between the foes.

The combined air operation came as President Donald Trump met with his Israeli counterpart Benjamin Netanyahu in Washington for their first in-person talks since the Middle East war began in late February.

Prime Minister Benjamin Netanyahu visited the White House Tuesday for his first in-person talks with President Donald Trump since the Iran war began, as the US military reported it had intercepted multiple missiles launched by Tehran.

Iran will halt its own attacks as long as the United States does the same, a senior Iranian official told Reuters on Sunday. The development comes as the United States pressed pause on its bombing campaign after President Donald Trump's advisers told him they were running out of targets and expressed worries about depleting the US arsenal.

The Iran war broadened over the weekend despite a pause in US strikes, as Yemen's Iran-aligned Houthis attacked Saudi oil installations along the Red Sea coast and Iran accused Ukraine of targeting one of its vessels in the Caspian Sea.

The US military launched air strikes on Iran late on Thursday and early on Friday, racking up 13 consecutive nights of attacks.

After the foes' fighting over the strategic Strait of Hormuz led to the collapse of a preliminary deal, the Middle East war has expanded to include the region's other key chokepoint for global oil supplies.

The US said it had completed an eighth straight night of attacks against Iran after earlier announcing that two US military personnel were killed in Jordan and another was missing ​following an Iranian attack.

At least 1,127 Palestinians had been killed since the truce took effect last October, according to Gaza's health ministry.

In a statement, Katz's office said the two men spoke overnight and the minister "emphasised Israel's determination to remain in the security zones in Syria, Gaza, and Lebanon in order to protect Israel's borders and the communities near the border from the threats posed by jihadist forces".

Nearly a month after Washington and Tehran signed a memorandum of understanding aimed at ending the Middle East war, the two foes have resumed fighting across the region.

Indonesia has accepted an invitation from the Iranian government for President Prabowo Subianto to visit Tehran, the Foreign Ministry confirmed on Tuesday, saying preparations were underway despite lingering tensions between Iran and the United States.

The first clinical trial is under way of an antiviral drug's effectiveness in people exposed to the deadly Ebola strain spreading in the Democratic Republic of Congo, the WHO said Tuesday.

President Donald Trump on Tuesday reimposed a naval blockade of all Iranian ports and threatened to hit power plants and bridges next week unless Tehran resumes negotiations, in the latest US escalation of the conflict.

"POTUS is absolutely right. Whoever provides secure and safe passage of commercial vessels through the Strait of Hormuz should be compensated for this service. Iran has always been the GUARDIAN of the Strait and will remain so FOREVER. 20% is of course too much. We will be fair," Tehran's top diplomat wrote, in a social media post.

"You know very well that not only do we not have any enmity with your country, but we also love you, the noble people, who understand the pain and oppression of the Palestinian people more than any other nation," the IRGC said in a statement carried by Fars News.

The United States launched a third night of strikes on Iran Tuesday as President Donald Trump reimposed a blockade on Iranian ports and floated a 20 percent fee on cargo in the vital Strait of Hormuz.

Higher energy prices, especially for gasoline, are politically sensitive for Trump ahead of November's congressional elections.

Iran's Revolutionary Guards said on Monday they targeted US military facilities in Bahrain and Kuwait, destroyed radar systems in Oman, and struck fuel tanks and ammunition depots at Prince Hassan Air Base in Jordan in their latest response to another wave of US strikes.

The US Central Command (CENTCOMM) said its forces had completed their latest barrage, which began overnight Sunday, on dozens of Iranian targets.

Foreign Minister Sugiono leads a delegation comprising People’s Consultative Assembly (MPR) Speaker Ahmad Muzani to pay final respect for Iranian late supreme leader Ali Khamenei, who was buried in his home city of Mashhad on Friday.

US and Iranian forces exchanged heavy missile and drone strikes with Tehran targeting US facilities in states across the Gulf on Sunday after saying it had again closed the vital Strait of Hormuz.

It is just over three weeks since Washington and Tehran signed an agreement aimed at turning a months-long ceasefire into a durable peace, but the trading of fire for a second day in a row on Thursday threatened a return to full-scale regional war.

The burial in Mashhad in northeast Iran follows a week of mass funeral processions, rallies and mourning ceremonies that has coincided with a renewed burst of conflict with the United States following weeks of truce in the four-month-old war.

Secretary of State Marco Rubio notified Congress of the long-expected move, which will be effective in 45 days unless lawmakers take the unlikely step of blocking it.

Both sides reported hitting dozens of targets, placing fresh strain on an interim deal to end their war and pushing oil prices to their highest level in two weeks.