WASHINGTON, United States (AFP) — Two US Navy pilots were shot down over the Red Sea early Sunday in “an apparent case of friendly fire,” the American military said.

Both pilots were recovered alive but “initial assessments indicate that one of the crew members sustained minor injuries,” the US Central Command (Centcom) said late Saturday local Florida time — where Centcom is headquartered.

“This incident was not the result of hostile fire, and a full investigation is underway.”

Centcom said the guided missile cruiser USS Gettysburg “mistakenly fired on and hit the F/A-18” fighter aircraft, which was flown by the Navy pilots off another ship, the USS Harry S. Truman.

The potentially disastrous mistake underscores the dangers of a mission the US has been involved in for more than a year as Yemen’s Houthi rebels have repeatedly targeted merchant vessels in the Red Sea and Gulf of Aden that they say are Israeli-linked.

On Saturday the US said it struck targets in Yemen’s rebel-held capital, hours after a Houthi rebel missile wounded people in Israel’s commercial hub Tel Aviv.

American forces also shot down multiple Houthi drones and an anti-ship cruise missile over the Red Sea, it said.