One of the pilots who flew an F-15E fighter jet in Iran has been rescued, a well-placed source told Fox News.
A search is still ongoing for the second crew member, the source said.
President Donald Trump has been briefed on the incident, which marks the first known loss of U.S. aircraft in Iran since the conflict known as Operation Epic Fury began Feb. 28.
It comes after 13,000 combat flights and five weeks into the campaign. Three F-15s were lost in a friendly fire incident in Kuwait.
The Islamic Revolutionary Guard Corps (IRGC) and state media claimed to have shot down the U.S. fighter jet over central Iran, specifically in the mountainous Kohgiluyeh and Boyer-Ahmad province.
WHAT B-52 BOMBERS BRING TO IRAN FIGHT - AND WHAT IT MEANS FOR THE WAR
Initial Iranian reports claimed the aircraft was an F-35 Lightning II stealth fighter. However, subsequent photos of wreckage released by Iranian media suggest the aircraft may be an F-15E Strike Eagle, likely from the 494th Fighter Squadron based at Royal Air Force Lakenheath base.
The Trump administration has notified congressional leaders about the incident, two sources confirmed to Fox.
The jet was apparently shot down by Iran, one U.S. official told Fox News Digital. Central Command, the theater responsible for operations in the Middle East, has not confirmed the incident but is expected to issue a statement soon.
Local footage appears to show HC-130s and HH-60 Black Hawks flying low over Iranian territory, suggesting a search for those on board. Israeli Defense Forces paused their strikes while the search and rescue operation is underway.
Combat search-and-rescue missions inside hostile territory are among the most dangerous operations, often requiring aircraft and helicopters to operate deep inside enemy air defenses. U.S. fighter pilots undergo advanced survival, evasion, resistance and escape (SERE) training designed to prepare them to evade capture and survive behind enemy lines.
The F-15E Strike Eagle is a two-seat fighter jet designed for long-range strike missions, capable of carrying precision-guided munitions deep into enemy territory. It is typically crewed by a pilot and a weapons systems officer and is widely used for both air-to-ground and air-to-air operations. It can reach a speed of Mach 2.5 or 1,650 miles per hour.
Iranian state media released images purporting to show the damaged jet, including an ejector seat. Fox News has not verified their authenticity.
TRUMP SAYS IRAN 'NO LONGER A THREAT' AFTER 32 DAYS - OUTLINES NEXT PHASE OF US WAR
Iranian claims of shooting down U.S. aircraft have surfaced repeatedly during the conflict, though previous reports were denied by U.S. officials.
U.S. officials for weeks have insisted the U.S. and Israel have "complete control over Iranian skies," and recently sent the slower, non-stealthy B-52 bombers into Iran, underscoring how confident they were that Iranian airpower had been nearly eliminated.
"We are in this military operation … for 32 days," Trump said in an address Wednesday. "And the country has been eviscerated and essentially is really no longer a threat."
"They have no anti-aircraft equipment," Trump said. "Their radar is 100% annihilated. We are unstoppable."
Trump also said he expected operations to wrap up within two to three weeks, but added. "We are going to hit them extremely hard over the next two to three weeks."
Thirteen U.S. service members have lost their lives in Operation Epic Fury, and more than 350 have suffered injuries, though most have already returned to service, according to Central Command.
