President Donald Trump warned Iran on Thursday it must make a deal over its nuclear program or “really bad things” will happen, and set a deadline of 10 to 15 days, drawing a threat from Tehran to retaliate against U.S. bases in the region if attacked.

Amid a massive U.S. military buildup in the Middle East that has fueled fears of a wider war, Trump said negotiations with Iran to end the tense standoff were going well but demanded that Tehran reach a “meaningful” agreement, Reuters reported.

“Otherwise bad things happen,” Trump, who has repeatedly threatened to attack Iran, told the first meeting of his Board of Peace in Washington.

Trump spoke of the U.S. airstrikes carried out in June, saying Iran’s nuclear potential had been “decimated,” adding “we may have to take it a step further or we may not.”

“You’ll be finding out over the next probably 10 days,” he said. Asked later to elaborate, he told reporters aboard Air Force One: “I would think that would be enough time, 10, 15 days, pretty much maximum.”

But he declined to be specific, except to warn again of “really bad things” and insist that Iran would have to make a deal one way or another.

In a letter to U.N. Secretary-General Antonio Guterres, Tehran said it would not start any war but that “in the event that it is subjected to military aggression, Iran will respond decisively and proportionately” in its exercise of the right of self-defense.

“All bases, facilities, and assets of the hostile force in the region would constitute legitimate targets,” the letter said. “The United States would bear full and direct responsibility for any unpredictable and uncontrolled consequences.”

‘GOOD TALKS’: TRUMP

Trump’s threats to bomb Iran, with the two sides far apart in talks on Tehran’s nuclear program, have pushed up oil prices, and a Russian corvette warship on Thursday joined planned Iranian naval drills in the Gulf of Oman, a vital sea route for global energy.

Iranian and U.S. negotiators met on Tuesday and Iranian Foreign Minister Abbas Araqchi said they had agreed on “guiding principles.” White House press secretary Karoline Leavitt said on Wednesday, however, that the two sides remained apart on some issues.

Trump said “good talks are being had,” and a senior U.S. official said Iran would make a written proposal on how to address U.S. concerns.

Trump called on Tehran to join the U.S. on the “path to peace.”

“They can’t have a nuclear weapon, it’s very simple,” he said. “You can’t have peace in the Middle East if they have a nuclear weapon.”

Iran has resisted making major concessions on its nuclear program, though insisting it is for peaceful purposes. The U.S. and Israel in the past have accused Tehran of trying to develop a nuclear bomb.

Trump’s latest saber-rattling came as he talked himself up as a man of peace in a long, meandering speech while hosting world leaders at the launch of his Board of Peace. He proposed the body in September when he announced his plan to end Israel’s war against Hamas in Gaza. He later expanded the board’s remit to tackle conflicts worldwide, prompting many key Western allies to stay away.

Earlier on Thursday, Russia warned against an “unprecedented escalation of tension” around Iran on Thursday and urged restraint amid the U.S. military buildup in the region, which a senior American official said should be complete by mid-March.

THREAT OF WAR

Trump has sent aircraft carriers, warships and jets to the region, raising the prospect of another attack on the Islamic Republic.

The United States and Israel bombed Iran’s nuclear facilities and some military sites last June. U.S. Secretary of State Marco Rubio will meet Israeli Prime Minister Benjamin Netanyahu to discuss Iran on February 28, the senior U.S. official said.

Washington wants Iran to entirely give up uranium enrichment, a process used to create fuel for atomic power plants but that can also provide material for a warhead.

The U.S. and ally Israel also want Iran to give up long-range ballistic missiles, stop supporting groups around the Middle East and stop using force to quell internal protests.

Iran says it refuses to discuss issues beyond the atomic file, calling efforts to limit its missile arsenal a red line.

Satellite pictures have tracked both Iranian work to repair and fortify sites since last summer, showing work at both nuclear and missile sites, as well as preparations at U.S. bases across the Middle East over the past month.

Iran’s joint exercise with Russia came days into an extended series of Iranian naval drills in the Gulf of Oman, with Iranian state television showing special forces units deployed on helicopters and ships.

In a sign of growing concern over the increased tensions, Poland on Thursday became the latest European country to urge its citizens to leave Iran, with Prime Minister Donald Tusk saying Poles may only have hours to evacuate.

Trump began threatening strikes on Iran again in January as Iranian authorities crushed widespread protests with deadly violence that left thousands dead across the country.

Millions of files related to the late sex offender Jeffrey Epstein suggest the existence of a “global criminal enterprise” that carried out acts meeting the legal threshold of crimes against humanity, according to a panel of independent experts appointed by the United Nations Human Rights Council.

The experts said crimes outlined in documents released by the U.S. Justice Department were committed against a backdrop of supremacist beliefs, racism, corruption and extreme misogyny.

The crimes, they said, showed a commodification and dehumanization of women and girls.

“So grave is the scale, nature, systematic character, and transnational reach of these atrocities against women and girls, that a number of them may reasonably meet the legal threshold of crimes against humanity,” the experts said in a statement.

The experts said the allegations contained in the files require an independent, thorough and impartial investigation, and said inquiries should also be launched into how it was possible for such crimes to be committed for so long.

The U.S. Justice Department did not immediately respond to a request for comment.

A law, approved by Congress with broad bipartisan support in November, requires all Epstein-related files to be made public.

The U.N. experts raised concerns about “serious compliance failures and botched redactions” that exposed sensitive victim information. More than 1,200 victims were identified in the documents that have been released so far.

“The reluctance to fully disclose information or broaden investigations, has left many survivors feeling retraumatized and subjected to what they describe as ‘institutional gaslighting,'” the experts said.

The Justice Department’s release of documents has revealed Epstein’s ties to many prominent people in politics, finance, academia and business – both before and after he pleaded guilty in 2008 to prostitution charges, including soliciting an underage girl.

He was found hanged in his jail cell in 2019 after being arrested again on federal charges of sex trafficking of minors. His death was ruled a suicide.

Israeli Prime Minister Benjamin Netanyahu said on Sunday he told U.S. President Donald Trump last week that any U.S. deal with Iran must include the dismantling of Iran’s nuclear infrastructure, not just stopping the enrichment process, Reuters reported.

Speaking at the annual Conference of Presidents of Major American Jewish Organizations, Netanyahu also said Israel still needs to “complete the job” of destroying all tunnels in Gaza. Israel, he said, has already dismantled 150 km (93 miles) of an estimated 500 km.

A second round of talks between the U.S. and Iran are slated for this week. Iran is pursuing a nuclear agreement with the U.S. that delivers economic benefits for both sides, an Iranian diplomat was reported as saying on Sunday.

Netanyahu said he is sceptical of a deal but it must include enriched material leaving Iran. “There shall be no enrichment capability – not stopping the enrichment process, but dismantling the equipment and the infrastructure that allows you to enrich in the first place,” he said.

Iran and the U.S. renewed negotiations earlier this month to tackle their decades-long dispute over Tehran’s nuclear programme and avert a new military confrontation. The U.S. has dispatched a second aircraft carrier to the region and is preparing for the possibility of a sustained military campaign if the talks do not succeed, U.S. officials have told Reuters.

Netanyahu also said that he aimed to end U.S. military aid to Israel within the next 10 years, after the current 10-year deal of receiving $3.8 billion a year – which is largely spent in the United States on equipment – ends in 2028.

Due to a thriving economy, “we can afford to phase out the financial component of the military aid that we’re receiving, and I propose a 10-year draw down to zero. Now, in the three years that remain in the present memorandum of understanding and another seven years draw it down to zero,” Netanyahu said.

“We want to move with the United States from aid to partnership,” he said.