An Amber Alert has been issued for three children out of Caldwell. Police say the kids are likely with their biological mother, who has lost custody of them. Esmerelda Guerrero-Lopez is a 5-year-old Hispanic girl with black hair, brown eyes, about 3 feet and 7 inches tall, and weighs 45 lbs.

She was last seen wearing a pink hooded sweater, pink shirt with money on front, blue jeans with flowers on bottom and shiny black boots. Mirella Guerrero-Lopez is a 7-year-old Hispanic girl with black hair, brown eyes, about 4 feet tall, and weighs 55 lbs. She was last seen wearing a tan and pink coat, blue jeans and brown and pink shoes. Ubaldo Guerrero-Lopez Jr. is a 9-year-old Hispanic boy with black hair, brown eyes, about 4 feet 9 inches tall, and weighs 75 lbs. He was last seen wearing a grey hooded sweater, blue jeans and black "Adio" tennis shoes.

They were supposed to be dropped off at their foster home in Caldwell Saturday after being picked up for regular visitation by their biological mother.  Caldwell Police Detectives are investigating and working to find these kids.

If you know of the whereabouts of any of these children, or Bertha Guerrero-Castro, Caldwell PD wants to hear from you. Call them at 454-7531, or call 911.