FILE - Aircraft carrier USS Harry S. Truman is moored near Split, Croatia. AP
The two-seat F/A-18F Super Hornet fighter jet, worth around $67 million, went overboard after an unsuccessful attempt to slow it down as it landed, CNN, the Wall Street Journal and others reported.
A defense official told the US Naval Institute that the hook of the aircraft failed to catch the arresting wire on the aircraft carrier.
"The arrestment failed, causing the aircraft to go overboard," the defense official said, adding "both aviators safely ejected and were rescued by a helicopter."
It is the second F/A-18 operating off the Truman to be lost in just over a week.
Another jet fell off the same carrier on April 28 in an accident that injured one sailor, and also dragged a tractor that was towing the fighter plane into the sea.
And late last year, a F/A-18 operating off the Truman was lost after it was mistakenly shot down by the USS Gettysburg guided missile cruiser. Both pilots survived that incident.
The Truman is one of two US aircraft carriers operating in the Middle East, where US forces have been striking Yemen's Houthi group with strikes since mid-March.
Mediator Oman said Tuesday the United States and the Houthis had agreed a ceasefire.
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