Details surrounding the circumstances of how and where they were found were not immediately released.
Earlier in the day, sheriff's officials circulated photos of the three children, who are siblings.
Master Milo, 2, Jordan Milo, 12 and Acire Milo, 14, were last seen at about 9:30 p.m. Friday at the intersection of Berkshire and Stratford streets, according to officials.
Their possible destination was thought to be the 400 block of Highland Avenue in Barstow or the 1100 block of East Avenue K in Lancaster, authorities said.
Master was described as a 2-foot-tall boy weighing 30 pounds with brown eyes and black hair, worn in pony tails. He was last seen wearing a dark T-shirt, black pants, and blue Crocs.
Jordan was described as a 4-feet-11-inch tall female weighing 160 pounds with brown eyes and black hair. She was last seen wearing a pink shirt and pink pajama pants.
Acire was described as a 4-feet-11-inch tall female weighing 160 pounds with brown eyes and braided brown hair. She was last seen wearing a gray sweatshirt and multicolored pajama pants.
City News Service contributed to this report.