RICHMOND (CBS SF) — The search for three children who were abducted from San Pablo on Sunday is over after they, along with their mother, were found safe in Richmond.

A statewide Amber Alert was issued for the three children whose father was found shot to death on Monday morning in San Pablo.

The children, 12-year-old Hugo, 6-year-old Merari and 3-year-old Jenh Carlos, and their biological mother were found safe in Richmond, according to San Pablo police. San Pablo police initially said their last names were Ortez, but the California Highway Patrol has since announced in an Amber Alert that the children all have the  last name of Anguiano.

The children’s mother, identified as 35-year-old Alicia Ortez, a resident of the San Pablo-Richmond area, is a suspect in the death of her children’s father, according to the CHP.

KPIX 5 reports that the father had custody of the children.

Their father, whose name has not yet been released, was found shot to death in San Pablo on Monday morning, San Pablo police said.

Ortez and a male companion both are suspects in homicide, according to San Pablo police, but no formal charges have been made at this time. Police said investigators have not determined a motive for the killing.

Around 7:55 a.m. officers received reports of a man found dead from a gunshot wound in the backyard of a home in the 1600 block of 16th Street, according to police.

Officers found the man and pronounced him dead at the scene.

Anyone with information about the case is asked to call San Pablo police at (510) 215-3150 or the West Contra Costa Crime Stoppers Tip Line at (510) 799-8255 or 911 if the children are located.

TM and © Copyright 2014 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2014 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. Bay City News Service contributed to this report.