A U.S. drone was shot down by Yemen’s Houthi rebels on Wednesday, according to the Iran-backed group’s military arm and a senior U.S. military official.

The Houthis said it was an MQ-9 Reaper drone that was in Yemeni air space and was shot down by air defenses. The senior U.S. official said the military is still analyzing the episode, including whether the drone was in international airspace or over Yemen. A second U.S. official said the MQ-9 Reaper was over international waters when it was shot down. The two officials spoke on condition of anonymity to discuss details not yet made public.

The Houthis have fired at least four batches of drones and missiles toward southern Israel since Oct. 7. The group controls the capital and much of northern and western Yemen where the majority of the county’s population lives.