Yemen's Houthi rebels say a U.S. strike has hit a detention center for migrants in Saada, killing dozens of people.

The U.S. military's Central Command has not commented on the alleged strike on the detention center, but on Sunday said it has struck 800 Houthi targets since March 15.

U.S. airstrikes targeting Yemen's capital killed at least eight people overnight, the Houthi rebels said Monday, as the American military acknowledged carrying out over 800 individual strikes in their monthlong campaign.