Yemen’s Houthi rebels claim a U.S. airstrike hit a prison holding African migrants in Saada, killing at least 68 and injuring 47.

The U.S. military has not confirmed the strike but said it’s assessing the reports.

The alleged attack comes amid continued U.S. operations against the Houthis and has sparked renewed scrutiny of “Operation Rough Rider” and the Pentagon’s lack of transparency about airstrikes, CNN has reported.

Written by B.C. Begley