An F/A-18 fighter jet landing on the USS Harry S. Truman aircraft carrier in the Red Sea went overboard, forcing its two pilots to eject, a defense official told The Associated Press on Wednesday.

The incident Tuesday marks the latest mishap to mar the deployment of the Truman, which has been essential in the airstrike campaign by the United States against Yemen’s Houthi rebels.

Last month, another jet was actively under tow in the hangar bay when the move crew lost control. “The aircraft and tow tractor were lost overboard,” the Navy said in a statement.

On Tuesday, President Donald Trump and Oman’s foreign minister both said a ceasefire had been reached with the Houthis, who would no longer target ships in the Red Sea corridor — something not immediately acknowledged by the rebels.

Meanwhile, the Houthis continue to assess the damage after daytime Israeli airstrikes targeted Yemen’s rebel-held capital of Sanaa.

The F/A-18 Super Hornet landed on the Truman after a flight, but “the arrestment failed,” said the official, who spoke on condition of anonymity as they weren’t authorized to speak publicly about the incident now under investigation.

“Arrestment” refers to the hook system used by aircraft landing on carriers, which catch steel wire ropes on the flight deck. It remains unclear what part of the system failed.

The two pilots on board were later rescued by a helicopter and suffered minor injuries in the incident, the official added. No one on the flight deck was hurt.

CNN first reported on the incident.