US President Donald Trump says he will announce his decision on whether to keep the US in the Iran nuclear deal within 24 hours.
- Trump to announce decision at 2:00pm on Tuesday (US time)
- Boris Johnson urges Mr Trump to stick with agreement
- US President tells John Kerry to stay out of the issue
Mr Trump is facing a self-imposed May 12 deadline over whether to uphold the 2015 nuclear deal, which he long has criticised.
The announcement would be made from the White House at at 2:00am Tuesday (local time — 4:00am Wednesday AEST), Mr Trump tweeted.
Mr Trump has signalled he would pull out of the agreement by the deadline unless it was revised, but faces intense pressure from European allies not to do so.
The President has been the subject of an intense lobbying effort by American allies to maintain the agreement, with British Foreign Minister Boris Johnson making a last-ditch appeal to the administration in a visit to Washington this week.
"The President has been right to call attention to it," Mr Johnson said on one of the President's favourite TV shows, Fox & Friends.
"But you could do that without throwing the baby out with the bath water, without scrapping the whole thing."
Mr Johnson said a regional arms race could be spurred if the nuclear deal was to end and Iran was to become a nuclear power.
"You're going to have the Saudis wanting one, the Egyptians, the Emiratis," he said.
"It's already a very, very dangerous state at the moment. There doesn't seem to me at the moment to be a viable military solution."
The three European signatories to the deal, France, Germany and England, plan to remain in the agreement regardless of the United States' decision.
"I believe we have made good proposals within the European Union which we have presented to our American partners because we continue to believe that this deal makes the world safer," German Foreign Minister Heiko Maas said.
Trump tells Kerry to keep out of negotiations
European leaders say that they are open to negotiating a side agreement with Iran but that the existing framework must remain untouched for that to happen.
Earlier on Monday, Mr Trump criticised John Kerry after reports that the former secretary of state has been promoting the Iran nuclear deal.
Mr Trump said on Twitter: "The United States does not need John Kerry's possibly illegal Shadow Diplomacy on the very badly negotiated Iran Deal. He was the one that created this MESS in the first place!"
The Boston Globe reported on Friday that Mr Kerry, the lead negotiator on the Iran deal for the Obama administration, had been privately meeting with foreign officials to strategise on how to keep the US in the agreement.