Updated 8:45 p.m. Thursday, link to Napa County photos.
Mystery photographs, a hand grenade and four arrests were some results as multiple police agencies executed search warrants in several Northern California cities Thursday.
The stolen property includes cameras with images on them. Napa County sheriff's deputies are hoping people can identify the people in the photos and help them find theft victims. If you can help, please call sheriff's Deputy Chris Carlisle at (707) 253-4259.
Brenda Terrado, 62, of Walnut Creek, was arrested for possession of a controlled substance and booked into Solano County Jail, KTVU.com reported.
The investigation focused on and stealing property and vehicles, police. One of the search warrants turned up a hand grenade in Vallejo.