The U.S. military says an airstrike on a militant hideout north of Baghdad has killed at least 11 insurgents.

Military spokesman Maj. Derrick Cheng told The Associated Press on Friday that ground forces searched the site after the strike and found a cache of weapons, munitions and parts to build improvised explosive devices.

It's not immediately known whether any civilians were killed in the strike that an Iraqi security official said occurred Thursday morning.

The official spoke on condition of anonymity because he was not authorized to talk to the media.

Cheng says the suspected insurgents were hiding near several bunkers south of Balad Ruz in Diyala province. That's about 45 miles northeast of Baghdad.