By ZEKE MILLER and DEB RIECHMANN

WASHINGTON (AP) — The U.S. and Iran stepped back from the brink of possible war Wednesday, as President Donald Trump indicated he would not respond militarily after no one was harmed in Iran’s missile strike on two Iraqi bases housing U.S. troops.

Speaking from the White House, Trump seemed intent on deescalating the crisis, which reached a new height after he authorized the targeted killing last week of Gen. Qassem Soleimani, the head of Iran’s elite Quds Force. Iran retaliated overnight with its most direct assault on America since the 1979 seizing of the U.S. Embassy in Tehran, firing more than a dozen missiles from its territory at the U.S. installations.

Trump credited an early warning system “that worked very well” for the fact that no Americans or Iraqis were killed. He added that Americans should be “extremely grateful and happy” with the outcome.

Trump, facing one of the greatest tests of his presidency, said Wednesday that Iran appeared to be “standing down” and said the U.S. response would be to put in place new economic sanctions “until Iran changes its behavior.”

The strikes had pushed Tehran and Washington perilously close to all-out conflict and put the world’s attention on Trump as he weighed whether to respond with more military force. The Republican president delivered his remarks surrounded by his national security advisers in the foyer of the White House. It came after a late-night tweet in which he insisted “All is well!” after the strikes.

Iran, for days, had promised to respond forcefully to Soleimani’s killing, but its limited strike on two bases — one in the northern Iraqi city in Irbil and the other at Ain al-Asad in western Iraq — appeared to signal that it was also uninterested in a wider clash with the U.S. Foreign Minister Mohammad Javad Zarif tweeted that the country had “concluded proportionate measures in self-defense.”

Trump, who is facing reelection in November, campaigned for president on a promise to keep the United States from engaging in “endless war.”

Speaking Wednesday he said the United States is “ready to embrace peace with all who seek it.”

Trump opened his remarks by reiterating his promise that “Iran will never be allowed to have a nuclear weapon,” even as that country announced in the wake of Soleimani’s killing that it would no longer comply with any of the 2015 nuclear deal’s limits on enrichment that had been put in place to prevent it from building a nuclear device.

But he seized on the —at least temporary — moment of calm to call for new nuclear negotiations to replace the 2015 deal from which he withdrew the U.S., objecting that it didn’t limit Iran’s ballistic missile programs or constrain its regional proxy campaigns like those led by Soleimani.

The president spoke directly to Iran, saying, “We want you to have a future and a great future.”

Trump also announced he would ask NATO to become “much more involved in the Middle East process.” While he has frequently criticized NATO as obsolete and has encouraged participants to increase their military spending, Trump has sought to have the military alliance refocus its efforts on modern threats.

Turkish President Recep Tayyip Erdogan and Russian President Vladimir Putin in a joint statement after a closed-door meeting on Mideast security had warned that the further use of force “would lead to a new cycle of instability and would eventually damage everyone’s interests.”

However, in the hours before the missile strikes, Trump warned the longtime U.S. foe, “If Iran does anything that they shouldn’t be doing, they’re going to be suffering the consequences, and very strongly.”

And Iran’s Supreme Leader Ayatollah Ali Khamenei, speaking on Wednesday, said the strike was not necessarily the totality of Iran’s response.

“Last night they received a slap,” Khamenei said. “These military actions are not sufficient (for revenge). What is important is that the corrupt presence of America in this region comes to an end.”

Soleimani’s death last week in an American drone strike in Baghdad prompted angry calls for vengeance and drew massive crowds of Iranians to the streets to mourn him. Khamenei himself wept at the funeral in a sign of his bond with the commander.

The Iranians fired a total of 15 missiles in the latest strikes, two U.S. officials said. Ten hit the Ain al-Asad air base in Iraq’s western Anbar province and one targeted a base in Irbil in Iraq’s semi-autonomous Kurdish region. Four failed, said the officials, who were not authorized to speak publicly about a military operation.

According to a U.S. official, early warning systems detected the missile launches and alarms sounded, giving personnel at the bases time to get to shelter. Officials also said that the U.S. was closely watching the region and communicating with allies, and was aware of preparations for the attack. It’s unclear if any intelligence identified specific targets or was more general in the potential strike locations.

Two Iraqi security officials said a missile appeared to have struck a plane at Ain al-Asad, igniting a fire. There were no immediate reports of casualties from the attacks, according to the officials, who spoke on condition of anonymity as they had no permission to talk to journalists.

Ain al-Asad was first used by American forces after the 2003 U.S.-led invasion that toppled dictator Saddam Hussein, and it later was used by American troops in the fight against the Islamic State group. It houses about 1,500 U.S. and coalition forces. Trump visited it in December 2018, making his first presidential visit to troops in the region. Vice President Mike Pence visited both Ain al-Asad and Irbil in November.

Democrats called on Trump avoid military escalation with Iran.

Rep. Eliot Engel, D-N.Y., the chairman of the House Foreign Affairs Committee, said the administration needs to quickly “extricate us from what could lead into a full-fledged war with terrible casualties.” Engel said he feared the situation ”spirals out of control.”

The fallout for Trump’s order to kill Soleimani had been swift.

Iraq’s Parliament voted to expel U.S. troops from Iraq, which would undermine efforts to fight Islamic State militants in the region and would strengthen Iran’s influence in the Mideast.

The counterattack by Iran came as Trump and his top advisers were under pressure to disclose more details about the intelligence that led to the American strike that killed Soleimani.

Top Senate Democrats, citing “deep concern” about the lack of information coming from the Trump administration about the Iran operation, called on Defense Department officials to provide “regular briefings and documents” to Congress.

Minority Leader Chuck Schumer and the senators said in a letter Wednesday that the White House’s classified War Powers notification to Congress was “generic, vague, and entirely inconsistent in its level of detail” compared with the norm.

They also registered their “grave concern” with Trump’s comments on targeting Iranian cultural sites and asked for clarification. Members of Congress were to be briefed on the strike Wednesday afternoon in closed-door sessions on Capitol Hill.

Trump and top national security officials have justified the airstrike with general statements about the threat posed by Soleimani, who commanded proxy forces outside Iran and was responsible for the deaths of American troops in Iraq.

But the details have been scarce.

Soleimani was targeted while he was at an airport in Baghdad with Abu Mahdi al-Muhandis, a veteran Iraqi militant, who also was killed.

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Associated Press writers Kevin Freking, Lolita Baldor, Darlene Superville Alan Fram and Padmananda Rama contributed to this report.

By NASSER KARIMI, AMIR VAHDAT and JON GAMBRELL

TEHRAN, Iran (AP) — A stampede broke out Tuesday at a funeral for a top Iranian general killed in a U.S. airstrike, and at least 40 people were killed and more than 200 were injured as thousands thronged the procession, two Iranian news agencies reported.

The stampede took place in Kerman, the hometown of Revolutionary Guard Gen. Qassem Soleimani, as the procession began, said the semi-official Fars and ISNA news agencies, citing Pirhossein Koulivand, head of Iran’s emergency medical services.

There was no information as to what had set off the stampede. Online videos showed people lying apparently lifeless, their faces covered by clothing. Emergency crews performed CPR on others as people wailed in the background, crying out to God.

“Unfortunately as a result of the stampede, some of our compatriots have been injured and some have been killed during the funeral processions,” Koulivand said. The news agencies gave the death toll of 40, with 213 injured.

Soleimani’s burial was later delayed, with no new time given. Authorities cited concerns about the massive crowd that had gathered as a reason for the delay, the semi-official ISNA news agency said.

A procession in Tehran on Monday drew over 1 million people in the Iranian capital, crowding both main thoroughfares and side streets in Tehran. Such mass crowds can prove dangerous. A similar stampede, though on a much smaller scale, struck the 1989 funeral procession for Ayatollah Ruhollah Khomeini, killing at least eight people and injuring hundreds.

Soleimani’s death in a drone strike on Friday has sparked calls across Iran for revenge against America, drastically raising tensions across the Middle East. The U.S. government warned ships of an unspecified threat from Iran across the region’s waterways, crucial routes for global energy supplies. Meanwhile, the U.S. Air Force launched a drill with 52 fighter jets in Utah, just days after President Donald Trump threatened to hit 52 sites in Iran.

Earlier in the day, Hossein Salami, the new leader of Iran’s Revolutionary Guard, vowed to avenge Soleimani’s death as he addressed a crowd of supporters gathered at the coffin in a central square in Kernan.

“We tell our enemies that we will retaliate but if they take another action we will set ablaze the places that they like and are passionate about,” Salami said.

“Death to Israel!” the crowd shouted in response. Israel is a longtime regional foe of Iran.

The funeral processions in major cities over three days have been an unprecedented honor for Soleimani, viewed by Iranians as a national hero for his work leading the Guard’s expeditionary Quds Force.

The U.S. blames him for killing U.S. troops in Iraq and accused him of plotting new attacks just before he was killed in the drone strike near Baghdad’s airport. Soleimani also led forces supporting Syrian President Bashar Assad in that country’s civil war, and he also served as the point man for Iranian proxies in countries like Iraq, Lebanon and Yemen.

His slaying already has pushed Tehran to abandon the remaining limits of its 2015 nuclear deal with world powers as his successor and others vow to take revenge. In Baghdad, the parliament has called for the expulsion of all American troops from Iraqi soil, something analysts fear could allow Islamic State militants to mount a comeback.

In his eulogy to the crowd, Salami praised Soleimani’s work, describing him as essential to backing Palestinian groups, Yemen’s Houthi rebels and Shiite militias in Iraq and Syria. As a martyr, Soleimani represented an even greater threat to Iran’s enemies, Salami said.

According to a report on Tuesday by the semi-official Tasnim news agency, Iran has worked up 13 sets of plans for revenge for Soleimani’s killing. The report quoted Ali Shamkhani, the secretary of Iran’s Supreme National Security Council, as saying that even the weakest among them would be a “historic nightmare” for the U.S. He declined to elaborate,

“If the U.S. troops do not leave our region voluntarily and upright, we will do something to carry their bodies horizontally out,” Shamkhani said.

The U.S. Maritime Administration warned ships across the Mideast, citing the rising threats. “The Iranian response to this action, if any, is unknown, but there remains the possibility of Iranian action against U.S. maritime interests in the region,” it said.

Oil tankers were targeted in mine attacks last year that the U.S. blamed on Iran. Tehran denied responsibility, although it did seize oil tankers around the crucial Strait of Hormuz, the narrow mouth of the Persian Gulf through which 20% of the world’s crude oil travels.

The U.S. Navy’s Bahrain-based 5th Fleet said it would work with shippers in the region to minimize any possible threat.

The 5th Fleet “has and will continue to provide advice to merchant shipping as appropriate regarding recommended security precautions in light of the heightened tensions and threats in the region,” 5th Fleet spokesman Cmdr. Joshua Frey told The Associated Press.

Meanwhile, Iranian Gen. Alireza Tabgsiri, the chief of the Guard’s navy, issued his own warning.

“Our message to the enemies is to leave the region,” Tabgsiri said, according to ISNA. The Guard routinely has tense encounters with the U.S. Navy in the Persian Gulf.

Iran’s parliament, meanwhile, has passed an urgent bill declaring the U.S. military’s command at the Pentagon and those acting on its behalf in Soleimani’s killing as “terrorists,” subject to Iranian sanctions. The measure appears to be an attempt to mirror a decision by Trump in April to declare the Revolutionary Guard a “terrorist organization.”

The U.S. Defense Department used the Guard’s designation as a terror organization in the U.S. to support the strike that killed Soleimani. The decision by Iran’s parliament, done by a special procedure to speed the bill to law, comes as officials across the country threaten to retaliate for Soleimani’s killing.

The vote also saw lawmakers approve funding for the Quds Force with an additional 200 million euros, or about $224 million.

Also Tuesday, Iranian Foreign Minister Mohammad Javad Zarif said the U.S. had declined to issue him a visa to travel to New York for upcoming meetings at the United Nations. As the host of the U.N. headquarters, the U.S. is supposed to allow foreign officials to attend such meetings.

“This is because they fear someone will go there and tell the truth to the American people,” Zarif said. “But they are mistaken. The world is not limited to New York. You can speak with American people from Tehran too and we will do that.”

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

Solemani will ultimately be laid to rest between the graves of Enayatollah Talebizadeh and Mohammad Hossein Yousef Elahi, two former Guard comrades. The two died in Operation Dawn 8 in Iran’s 1980s war with Iraq in which Soleimani also took part, a 1986 amphibious assault that cut Iraq off from the Persian Gulf and led to the end of the bloody war that killed 1 million people.

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Gambrell reported from Dubai, United Arab Emirates.