DUBAI, United Arab Emirates (AP) — The British military launched airstrikes with the United States targeting Yemen’s Houthi rebels, officials said early Wednesday, their first attack in Washington’s new intense campaign targeting the Iran-backed group.

Yemen’s Houthi rebels alleged on Monday that a US airstrike hit a prison holding African migrants. The US military had no immediate comment.

Yemen’s Houthi rebels alleged an American airstrike killed at least 68 people and injured scores more in a detention center holding African migrants in northern Yemen on Monday, one of the deadliest attacks in the six-week-long U.