Donald Trump said the United States and Iran had “direct negotiations” on a possible nuclear deal on Saturday.

The U.S. president said on Monday that discussions between Washington and Tehran would be at a “very high level” if no deal was reached, and it would be a “very bad day” before warnings.

Last month, Trump raised the prospects for military operations against Iran after his supreme leader Ayatollah Ali Khamenei Proposal to publicly reject direct negotiations.

Trump revealed talks after meeting with Israeli leader Benjamin Netanyahu, who had previously proposed attacks on Iran to prevent its prospect of obtaining nuclear weapons.

“We had a big meeting on Saturday (with Iran) and we deal with them directly … maybe there will be a deal, and it will be great,” Trump said in the Oval Office.

Trump later said that if the negotiations were not successful, Iran would be in “huge danger”, adding: “Iran cannot have nuclear weapons, and if the negotiations are not successful, I actually think it’s a very bad day for Iran.”

The president did not provide more details about the negotiations, including how far they progressed or which officials they were involved.

Iran has not commented publicly since Trump said there has been no direct link between the two countries since 1980.

On Sunday, Iranian Foreign Minister Abbas Araqchi said: “We expressed our point: We favor diplomacy and negotiations (with Washington), but only (through (through) indirect (channel)).

“Of course, it must be admitted that so far, no negotiations have been conducted.”

In March, Trump sent a letter to Iranian leaders through an intermediary in the United Arab Emirates, listing his willingness to negotiate.

The proposal was rejected by Iran, although its leadership expressed willingness to discuss possible deals with the United States through third parties.

For decades, curbing Iran’s ability to build nuclear weapons has been a key foreign policy goal for the United States and its allies.

In 2015, then-President Barack Obama reached an agreement with Iran that would limit its nuclear activities and allow international inspectors to enter the country to ensure that facilities are only used for civilian purposes rather than weapons production.

In return, sanctions relief will be given to Iran weakening its economy.

The agreement was signed by China, France, Germany, Russia and the United Kingdom.

However, in 2016, Trump unilaterally pulled the United States out of the deal, which he was very critical of in his first presidential campaign.

In the following years, Iran increasingly violated its terms. The IAEA warns that Tehran has established a large amount of enriched uranium that can be used to make nuclear bombs.

In recent months, Trump has repeatedly raised the prospect of a new deal negotiation with Iran, while threatening to reach military action.

Israel believes that preventing its opponent Iran from obtaining nuclear weapons is at the heart of its long-term security. It has reportedly hit production facilities in recent months.

Last year, Israel said it attacked Iranian nuclear sites in retaliation for Iran’s earlier missile attacks on Israel.

Speaking at the White House, Netanyahu said: “We are both unified and the United States, with the intention of Iran never obtaining nuclear weapons.

“If it could be done completely diplomatically, like the way it is done in Libya, I think that’s a good thing.”