WASHINGTON (AP) — President Donald Trump on Monday called for the U.S. and other oil-producing economies to pump more oil as crude prices remain volatile following U.S. strikes on Iranian nuclear facilities.

Trump urged stepped-up production as the White House sharpened its warnings to Iran against closing the Strait of Hormuz, a vital oil and gas shipping lane, in retaliation for the U.S. strikes on Iran's nuclear program.

“To the Department of Energy: DRILL, BABY, DRILL!!! And I mean NOW!!!” Trump posted on social media. He added, “EVERYONE, KEEP OIL PRICES DOWN. I’M WATCHING! YOU’RE PLAYING RIGHT INTO THE HANDS OF THE ENEMY. DON’T DO IT!”

Trump made his call hours before Iran launched attacks on U.S. forces at Qatar’s Al Udeid Air Base, the country's first act of direct retaliation against the U.S. after Trump ordered strikes on Iran’s nuclear facilities. No injuries were reported in the attack, according to a U.S. defense official.

Missiles also were fired on Monday evening at the Ain al-Assad base housing U.S. troops in western Iraq, an Iraqi security official told The Associated Press. The official spoke on condition of anonymity because they were not authorized to comment publicly.

No one has claimed responsibility for the attack on the Iraqi base. U.S. officials did not immediately respond to a request for comment about that attack.

Al-Udeid Air Base, a sprawling facility that hosts the forward headquarters of the U.S. military’s Central Command, was a major staging ground during the U.S. wars in Iraq and Afghanistan. The base houses some 8,000 U.S. troops, down from about 10,000 at the height of those wars.

Israel and Iran's war appeared headed toward a new uncertain moment with the attacks and as U.S. embassies and military installations throughout the Middle East were placed on high alert.

Global markets were also trying to ascertain what lays ahead after the U.S. struck key Iranian nuclear facilities over the weekend with a barrage of 30,000-pound bunker busting bombs and Tomahawk missiles.

Iran’s parliament has approved cutting off the Strait of Hormuz, a narrow shipping lane in the Persian Gulf that about 20% of global oil and gas passes through. It’s now up to Iran’s national security council to decide whether to move forward with the idea, which could lead to a spike in the cost of goods and services worldwide.

By Monday afternoon, the price of a barrel of benchmark U.S. oil was down 6.1% at $69.34. Brent crude, the international standard, dropped 5.3% to $71.50 per barrel. That brought oil prices nearly back to where they were before the fighting began over a week ago, when a barrel of U.S. crude was just above $68.

White House press secretary Karoline Leavitt warned Tehran anew against closing the strait, saying, “the Iranian regime would be foolish to make that decision.”

The State Department has doubled the number of emergency evacuation flights it is providing for American citizens wishing to leave Israel, ordered the departure of nonessential staff from the U.S. Embassy in Lebanon. It also is stepping up travel warnings around the Middle East because of concerns Iran will retaliate against U.S. interests in the region.

In an alert sent to all Americans worldwide and posted to its website on Sunday, the State Department warned all U.S. citizens abroad to exercise caution.

Hours before Iran launched its attack on Monday, the U.S. Embassy in Qatar issued an alert on its website urging American citizens in the energy-rich nation to “shelter in place until further notice.” The Qatari government issued an extraordinary order to shut its busy airspace.

Many energy industry analysts are skeptical that Iran would go forward with a full closure of the strait, something that it has threatened to do in the past.

Iran would face the possibility of retaliation against its own shipments and the possibility that the move would upset China, the biggest purchaser of Iranian crude.

The U.S. and allies pressed Russia in the leadup to Moscow's 2022 invasion of Ukraine with threats to its oil industry, and then followed through as many Western oil companies pulled out of the country and the U.S. and Europe imposed sanctions on Russian industry.

But Iran is far less integrated into the global economy than Russia, which was reliant on European markets for its oil and gas exports and still went forward with the invasion despite U.S. warnings.

“There’s been a lot of suggestion as well that this isn’t something that is incredibly likely, and that’s generally attributed to economic interdependence, which I don’t want to suggest doesn’t matter. It absolutely does,” said Colby Connelly, a senior fellow at the Middle East Institute. Connelly added, "if the 2020s have taught us anything so far, it’s that economic ties don’t always prevent conflict."

In another development Monday, Leavitt appeared to play down Trump calling into question the future of Iran’s ruling theocracy, seemingly contradicting his administration’s earlier calls on Tehran to resume negotiations and avoid an escalation in fighting.

“It’s not politically correct to use the term, ‘Regime Change,’ but if the current Iranian Regime is unable to MAKE IRAN GREAT AGAIN, why wouldn’t there be a Regime change???” Trump posted on social media. “MIGA!!!”

Leavitt said Trump's “posture and our military posture has not changed.”

“The president was just simply raising a question that I think many people around the world are asking,” Leavitt said.

Trump on Monday also attacked the news media for questioning his assertion that the U.S. strikes “totally destroyed” three Iranian nuclear sites. Air Force Gen. Dan Caine, the chairman of the Joint Chiefs of Staff, said at a Sunday news briefing that the strikes severely damaged the nuclear facilities, but a final assessment of the attack had yet to be finished.

“The sites that we hit in Iran were totally destroyed, and everyone knows it,” Trump posted on Truth Social. “Only the Fake News would say anything different in order to try and demean, as much as possible — And even they say they were ‘pretty well destroyed!’”

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AP writers Josh Stan Choe in New York, Jon Gambrell in Dubai, United Arab Emirates, and Josh Boak, Matthew Lee, Chris Megerian and Eric Tucker in Washington contributed reporting.

FILE - The aircraft carrier USS Dwight D. Eisenhower and other warships crosses the Strait of Hormuz into the Persian Gulf on Sunday, Nov. 26, 2023. (Information Technician Second Class Ruskin Naval/U.S. Navy via AP, file)

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