AS IT HAPPENED: PM to visit Singapore for fuel talks; Donald Trump says Iran wants him to 'keep bombing', He's 'very disappointed' in Australia; ASX in $70bn rebound; Israel sends sinister threat to Iranian citizens

It's been another big day for the Middle East conflict, with the world waiting to see if US President Donald Trump will follow through on his threat to send Iran "back to the Stone Age" if they don't reopen the Strait of Hormuz in the coming hours.

Here are the key moments from today, Tuesday, April 7:

- Trump hit out at several allies, including Australia for not offering enough assistance in the war, saying he was "very disappointed" with Australia for "not helping us".

- Trump reiterated his threat to attack Iran's energy installations and bridges if the country does not cooperate by 8pm US Eastern Time on Tuesday (10am, Wednesday AEST) tomorrow. However, reports from Axios state he may be willing to pull back from an all-out attack if he can see progress being made towards a deal.

- Israel's armed forces sent a cryptic warning to Iran's citizens, urging them not to catch public transport until 9pm local time, saying they would be endangering their own lives if they did so.

- Closer to home, Prime Minister Anthony Albanese announced he would travel to Singapore in a bid to secure the country's fuel supply, as he and Energy Minister Chris Bowen insisted Australia has supply coming into the country until next month.

Uber Eats is set to offer a temporary fuel relief payment to drivers and riders during the fuel crisis that is hitting Australia.

Workers who drive or ride more than 100km while delivering will be eligible for the temporary payment, which began yesterday.

"For a period of two months, this temporary distance-based payment of $5/100km will be automatically paid to delivery people on a weekly basis." Uber Eats General Manager Ed Kitchen said.

"This payment is provided by Uber Eats directly and will not result in any additional costs for consumers, merchants or restaurant partners."

The King Fahd Causeway, a key bridge linking Saudi Arabia and the island of Bahrain, reopened after closing for hours overnight due to possible threats from Iran.

The King Fahd Causeway Authority made the announcement in a post on X, saying the only route by road between Bahrain and the Arabian Peninsula had reopened.

Bahrain's airport has been closed over the Iranian attacks for weeks.

The hours-long closure of the bridge came after a ballistic missile attack from Iran targeted Saudi Arabia and may have done damage to energy infrastructure there.

The kingdom has not elaborated on damage from that attack.

Iranian state television on Tuesday claimed 14 million people had volunteered to fight for the country if there is a ground invasion by the United States and Israel.

The claim by state TV, which included no other information, doubles an April 2 claim by Iranian Parliament speaker Mohammad Bagher Qalibaf that seven million had volunteered.

Iran is home to some 90 million people.

Iran had conducted a bloody crackdown on nationwide demonstrations in January that killed thousands and saw tens of thousands detained.

State media and text message campaigns have urged people to volunteer.

The government also has called on retired soldiers to express their interest in fighting, while the paramilitary Revolutionary Guard's all-volunteer Basij force has begun accepting children as young as 12 into its ranks.

After the 1979 Islamic Revolution, Ayatollah Ruhollah Khomeini, for instance, called for a 20-million Basij force.

Saudi Arabia's defence ministry has announced it has destroyed 18 drones overnight, as the threat of further attack from Iran increases.

In a post on X, it said 18 drones had been intercepted and destroyed "during the past hours".

As a precaution, the country has shut the King Fahd Causeway, a 25km bridge connecting Saudi Arabia to Bahrain, which is a crucial transport pipeline in the Gulf.

It is not known when the causeway will reopen.

Israel has asked Iranian citizens to not travel on trains from now until 9pm local time, saying they could be endangering their lives if they do so.

In a post on X translated into Farsi, the Israeli Defence Force (IDF) said: "Dear Citizens, for the sake of your security, we kindly request that from this moment until 21:00 Iran time, you refrain from using and traveling by train throughout Iran.

"Your presence on trains and near railway lines endangers your life."

It comes as US President Donald Trump threatened to blow up all of the bridges and power plants in Iran if the country didn't reopen the Strait of Hormuz to international shipping traffic.

US President Donald Trump has been compared to a "mad dog", as a report from Axios claimed the President may not act on his all-or-nothing threat to Iran if he believes signs of progress towards a deal are made.

The report, citing US officials close to the President, claimed the president "is the most bloodthirsty" they have ever seen, saying Secretary of War Pete Hegseth and Secretary of State Marco Rubio were "like the doves compared to the president".

Trump has threatened to bomb all bridges and power plants in Iran if the Gulf nation doesn't reopen the Strait of Hormuz by Tuesday ET.

However, a senior administration official told Axios the President might back away from his ultimatum."If the president sees a deal is coming together, he'll probably hold off.

"But only he and he alone makes that decision," the official said.

Axios reports several people close to the president, including Vice President JD Vance, are calling for Trump to seek a deal with Iran.

The ongoing fuel crisis in Australia has seen more electric vehicles (EVs) sold in a month than ever before in March.

Figures from the Federal Chamber of Automotive Industries (FCAI) and the Electric Vehicle Council combined show 15,839 battery electric vehicles (BEV) were sold in March.

BEVs represented 14.6 per cent of new car sales in March - nearly double the share in the same month last year - and 11.8 per cent for the year to date.

"The fuel crisis has undoubtedly sparked unprecedented new interest in both new and used EVs, but it's the Albanese Government's Electric Car Discount that's actually getting many Australians into one," National Automotive Leasing and Salary Packaging Association (NALSPA) chief executive Rohan Martin said.

With fuel prices skyrocketing around the country and with thousands of petrol stations running dry, Australians are beginning to consider EVs in the long term.

The King Fahd Causeway, which connects Saudi Arabia to Bahrain, has been closed due to the threat of an Iranian attack, according to Associated Press.

The announcement was made moments ago as Saudi Arabia comes under renewed missile attack from Iran.

The causeway is 25km long and consists of five bridges sitting on top of 536 concrete pylons.

It comes as US President Donald Trump threatened to destroy Iran's bridges and power plants if they don't meet his deadline to reopen the Strait of Hormuz to international shipping.

New Zealand Prime Minister Christopher Luxon has described Trump's recent threats against Iranian civilian infrastructure as "unhelpful".

"Unhelpful because more military action's not necessary," Luxon told Radio New Zealand today.

"I think the bottom line is that the focus needs to be on not seeing this conflict expand any further," Luxon said.

"We got threats from the president over the weekend. Any of those actions including bombing bridges and reservoirs and civilian infrastructure would be unacceptable as well," Luxon added.

He said New Zealand Foreign Minister Winston Peters' message to US Secretary of State Marco Rubio at a meeting in Washington later this week would be to de-escalate the conflict.

Peters would "certainly be encouraging the US and Iran to de-escalate quickly," Luxon said.