A cruise missile launched by the Houthis into the Red Sea on Tuesday night came within a mile of a US destroyer before it was shot down, four US officials told CNN, the closest a Houthi attack has come to a US warship.

In the past, these missiles have been intercepted by US destroyers in the area at a range of eight miles or more, the officials said. But the USS Gravely had to use its Close-In Weapon System (CIWS) for the first time since the US began intercepting the Houthi missiles late last year, which ultimately succeeded in downing the missile, officials said.

The CIWS, an automated machine gun designed for close-range intercepts, is one of the final defensive lines the ship has to shoot down an incoming missile when other layers of defense have failed to intercept it.

The episode underscores the threat the Houthis continue to pose to US naval assets and commercial shipping in the Red Sea, despite multiple US and British strikes on Houthi infrastructure inside Yemen. The close call also comes just days after three US service members were killed in a drone attack by Iran-backed militants at a US outpost in Jordan.