A fighter jet maneuvers on the deck of the USS Dwight D. Eisenhower in the Red Sea, June 11, 2024. (AP Photo/Bernat Armangue, File)

DUBAI, United Arab Emirates (AP) — Two U.S. Navy pilots were shot down Sunday over the Red Sea in an apparent "friendly fire" incident, the U.S military said, marking the most serious incident to threaten troops in over a year of America targeting Yemen's Houthi rebels.

Both aviators were recovered alive after ejecting from their stricken two-seat F/A-18 aircraft, with one suffering minor injuries. But the shootdown underlines just how dangerous the Red Sea corridor has become, with ongoing attacks on shipping by the Iranian-backed Houthis despite U.S. and European military coalitions patrolling the area.

The U.S. military had conducted airstrikes targeting Yemen's Houthi rebels at the time of the friendly fire incident, though the U.S. military's Central Command did not elaborate on what the pilots' mission was and did not respond to questions from The Associated Press.

The F/A-18 shot down had just flown off the deck of the USS Harry S. Truman aircraft carrier, Central Command said. On Dec. 15, Central Command acknowledged the Truman had entered the Mideast, but hadn't specified that the carrier and its battle group was in the Red Sea.

"The guided-missile cruiser USS Gettysburg, which is part of the USS Harry S. Truman Carrier Strike Group, mistakenly fired on and hit the F/A-18," Central Command said in a statement. "This incident was not the result of hostile fire, and a full investigation is underway."

From the military's description, the aircraft shot down was a two-seat F/A-18 Super Hornet fighter jet assigned to the "Red Rippers" of Strike Fighter Squadron 11 out of Naval Air Station Oceana, Virginia. While Central Command referred to both as pilots, typically a two-seat F/A-18 has a pilot and a weapons officer on board.

It wasn't immediately clear how the Gettysburg could mistake an F/A-18 for an enemy aircraft or missile, particularly as ships in a battle group remain linked by both radar and radio communication.

However, Central Command said that warships and aircraft earlier shot down multiple Houthi drones and an anti-ship cruise missile launched by the rebels. Incoming hostile fire from the Houthis has given sailors just seconds to make decisions in the past.

Since the Truman's arrival, the U.S. has stepped up its airstrikes targeting the Houthis and their missile fire into the Red Sea and the surrounding area. However, the presence of an American warship group may spark renewed attacks from the rebels, like what the USS Dwight D. Eisenhower saw earlier this year. That deployment marked what the Navy described as its most intense combat since World War II.

On Saturday night and early Sunday, U.S. warplanes conducted airstrikes that shook Sanaa, the capital of Yemen which the Houthis have held since 2014. Central Command described the strikes as targeting a "missile storage facility" and a "command-and-control facility," without elaborating.

On Sunday, Israeli Prime Minister Benjamin Netanyahu said his country would act "forcefully" against the Houthis, as it has against other allies of Iran, "only in this case, we are not acting alone."