DUBAI/TEL AVIV/WASHINGTON (REUTERS)

US President Donald Trump warned Iran on Thursday to "get serious" about a deal to end nearly four weeks ​of fighting, after its foreign minister said Tehran was reviewing the US proposal but that there were no talks on winding down the war.

Trump's comments came as the economic and humanitarian toll of the conflict mounted, with fuel shortages spreading worldwide, sending companies and countries scrambling to contain the fallout.

"Indirect talks" between the US and Iran are taking place through messages relayed by Pakistan, with other states including Turkiye ⁠and Egypt also supporting mediation efforts, Pakistan's foreign minister said.

But Iranian Foreign Minister Abbas Araqchi said this did not amount to negotiation.

A 15-point US proposal to end the conflict includes demands ranging from dismantling Iran's nuclear programme and curbing ‌its missiles to effectively handing over control of the Strait of Hormuz, according to sources and reports.