DUBAI, United Arab Emirates (AP) — A new American airstrike campaign against Yemen’s Houthi rebels appears more intense and more extensive, as the U.S. moves from solely targeting launch sites to firing at ranking personnel as well as dropping bombs in city neighborhoods, an Associated Press review of the operation shows.

The full extent of the damage and possible casualties wasn’t immediately clear. The attacks followed a night of airstrikes early Friday that appeared particularly intense compared to other days in the campaign that began March 15.