WASHINGTON: A US service member was missing and three others ​wounded but in stable condition after their MH-60S Seahawk helicopter made an emergency landing in the Arabian Sea on Wednesday.

The US military said there was ‌no indication ​the ‌crash ⁠was ​caused by ⁠hostile action.

"US Navy assets in the region are currently searching for other aircrewman still missing," the ‌US Navy's ‌5th Fleet said. "The cause of incident ⁠is under investigation."

The ‌helicopter was deployed to the region on the USS George HW Bush aircraft carrier.

Helicopter water ‌landings can be dangerous, even for experienced pilots, ⁠given ⁠the propensity of top-heavy aircraft to flip upside-down during submersion.

US forces in the region are also on high alert amid periodic flare-ups in violence during the ceasefire between the US and ​Iran.