Federal and local authorities have raided 35 homes in Riverside County as part of the probe into a series of booby trap attacks targeting Hemet police officers.

Hemet police Capt. Dave Brown said Tuesday 16 people had been taken into custody following the raids, which began before dawn and continued throughout the morning.

Brown says a variety of arrests were made, including for weapons violations.

Riverside County District Attorney Rod Pacheco says all of those arrested were white supremacists.

Hemet police have been targeted with booby traps at least three times since New Year's Eve, including by a ballistic device that was strapped to a fence at the gang unit's compound and sent a bullet within inches of an officer's face.