WASHINGTON (Reuters) — The Marine Corps announced Sunday it had halted flights of three different types of aircraft, including its vaunted new MV-22 tilt-rotor troop helicopters, for safety inspections due to unrelated problems in each type.

The Corps said in a release that flights of all of its 11 current MV-22s, which take off and land like a helicopter but fly like a regular aircraft, had been suspended along with operations of its AH-1W "Cobra" attack helicopters and big CH-53 transport helicopters.