President Donald Trump has issued a stark warning to Iran, urging the country to accept a nuclear deal to avoid further “planned attacks,” citing that “there has already been great death and destruction, but there is still time to make this slaughter… come to an end.”

Trump spoke out via his social media platform, Truth Social, on Friday morning, reacting to the news that Israel had launched an overnight attack on Iran, targeting multiple nuclear and military sites. [time-brightcove not-tgx=”true”]

Referencing the ongoing negotiations over Iran’s nuclear program, Trump said that he had given Iran a chance to make a deal. 

“I told them, in the strongest of words, to ‘just do it,’ but no matter how hard they tried, no matter how close they got, they just couldn’t get it done,” Trump said. “Certain Iranian hardliners spoke bravely, but they didn’t know what was about to happen. They are all DEAD now, and it will only get worse.”

Trump added that Iran was told how “the United States makes the best and most lethal military equipment anywhere in the World, BY FAR, and that Israel has a lot of it, with much more to come. And they know how to use it.”

“Iran must make a deal, before there is nothing left, and save what was once known as the Iranian Empire. No more death, no more destruction, JUST DO IT, BEFORE IT IS TOO LATE.” Trump warned.

Read More: Iran Fires Back at Israel

The U.S. was decidedly not involved in the overnight military action, as confirmed by a statement from Secretary of State Marco Rubio, in which he urged Iran not to target the U.S.

“Tonight, Israel took unilateral action against Iran. We are not involved in strikes against Iran and our top priority is protecting American forces in the region. Israel advised us that they believe this action was necessary for its self-defense,” said Marco, in a statement shared by the White House shortly after the initial strikes. “President Trump and the Administration have taken all necessary steps to protect our forces and remain in close contact with our regional partners. Let me be clear: Iran should not target U.S. interests or personnel.”

A number of senior military officials and nuclear scientists have been killed by the Israeli strikes on Iran, with Ayatollah Ali Khamenei vowing retaliation, saying that Israel “should anticipate a severe punishment” and “has prepared for itself a bitter, painful fate, which it will definitely see.”

The Israel Defence Forces (IDF) announced the “preemptive, precise offensive” in a statement in the early hours of Friday morning, local time.

“Iran is closer than ever to obtaining a nuclear weapon. Weapons of mass destruction in the hands of the Iranian regime are an existential threat to the State of Israel and to the wider world,” the statement read. “The State of Israel has no choice but to fulfill the obligation to act in defense of its citizens.” 

Israeli Prime Minister Benjamin Netanyahu said the strikes, part of Operation Rising Lion, “will continue for as many days as it takes to remove this threat.”

Read More: Here Are the Top Iranian Generals and Scientists Targeted and Killed by Israeli Strikes

Iran has since responded with around 100 drone strikes on Israel, with Jordan confirming that drones also entered its airspace. 

Prior to this, talks between the U.S. and Israel had appeared to be heading in a more positive direction after Ali Shamkhani—senior adviser to Ayatollah Khamenei—said in May that Iran was willing to accept a deal subject to conditions.

Talks were still ongoing as of early June. Iran rejected a U.S. proposal and offered a counter-offer on June 9. The following day, Iranian lawmakers accused the U.S. of turning negotiation talks into a trap.

“The U.S. is not serious in negotiations at all. It has set the goal of talks as imposing its demands and has adopted offensive positions that are diametrically opposed to Iranians’ inalienable rights,” Iranian lawmakers said in a statement.

Now, with Israel and Iran trading strikes, world leaders are looking to the Middle East and urging restraint.

A spokesperson for U.N. Secretary-General António Guterres has relayed his concerns.

Guterres “condemns any military escalation in the Middle East” and “is particularly concerned by Israeli attacks on nuclear installations in Iran, while talks between Iran and the U.S. on the status of Iran’s nuclear programme are underway.”

Another round of nuclear talks between Iran and the U.S. was set to take place in the Sultanate of Oman’s capital of Muscat this weekend, but it remains to be seen if those will go ahead, now that Israel and Iran are engaged in military action.

How have other U.S. lawmakers reacted to Israel’s attack?

Sen. Lindsey Graham

Sen. Lindsey Graham of South Carolina, a Republican, has issued a number of comments on the strikes in Iran. “Game on. Pray for Israel,” read his initial reaction to the attack, which he called “one of the most impressive military strikes in Israeli history.”

Graham followed up with a statement remarking on the possibility of Iranian retaliatory strikes on “American military personnel or interests throughout the region.”

The Senator said if such actions were taken by Iran, then “America should have an overwhelming response, destroying all of Iran’s oil refineries and oil infrastructure putting the Ayatollah and his henchmen out of the oil business.”

He also expressed support for Trump’s comments, saying: “I very much appreciate President Trump’s strong statement in support of this Israeli operation and his urging for the Iranian Regime to make a deal to abandon their nuclear enrichment program to avoid further bloodshed.”

Sen. Ted Cruz

Sen. Ted Cruz of Texas, a Republican, has relayed support for Israel’s attack on Iran, citing it as an act of self-defense.

“President Trump has been clear that Iran must completely dismantle their nuclear capacity. Iran has given President Trump the middle finger. Israel is acting to defend themselves, and we should stand with them.” he said, later adding: “Tonight, pray for Israel. Pray for the American servicemen and women who are in harms way. And to the Ayatollah: If you attack American military bases, President Trump will respond with overwhelming force.”

Sen. Tom Cotton

Sen. Tom Cotton of Arkansas, a Republican, said: “Iran is the world’s worst state sponsor of terrorism, has the blood of thousands of Americans on its hands, and is rushing to build not only nuclear weapons, but also missiles that can strike the United States. We back Israel to the hilt, all the way… And if the Ayatollahs harm a single American, that will be the end of the Ayatollahs.”

Sen. Chris Murphy

Sen. Chris Murphy of Connecticut, a Democrat, criticized Israel and the Trump Administration over the strikes in Iran.

“Israel’s attack on Iran, clearly intended to scuttle the Trump Administration’s negotiations with Iran, risks a regional war that will likely be catastrophic for America and is further evidence of how little respect world powers—including our own allies—have for President Trump,” he said, describing Iran’s progression towards possible nuclear weapons as “a disaster of Trump and Netanyahu’s own making.”

Sen. Andy Kim

Sen. Andy Kim of New Jersey, a Democrat, has cautioned Iran on its response, whilst also issuing criticism at Israel’s decision to launch the overnight attack. 

“Iran should know that any targeting of U.S. forces and personnel stationed across the Middle East in retaliation for Israel’s actions would be a grave mistake,” he said. “This action ordered by Prime Minister Netanyahu appears to deliberately undermine ongoing American diplomatic negotiations about Iran’s nuclear program… We should do everything we can to stop this moment from spiraling into a wider conflict and bring parties back to the table to ensure that Iran does not obtain a nuclear weapon.”

Sen. John Fetterman

Sen. John Fetterman of Pennsylvania, a Democrat, also responded to Israel’s strikes on Iran. “Our commitment to Israel must be absolute and I fully support this attack,” he said. “Keep wiping out Iranian leadership and the nuclear personnel. We must provide whatever is necessary—military, intelligence, weaponry—to fully back Israel in striking Iran.”