UPDATE 8 a.m.
San Pablo Police have arrested and charged 35-year-old Alicia Ortez with the murder of her estranged husband.
The couple's three children were the subject of an Amber Alert for several hours last night after the as-yet-unidentified father was found shot to death in the backyard of his home.
The kids were found unharmed in Richmond.
UPDATE, 6:30 a.m.
The statewide Amber Alert for three missing children has been canceled after they were found safe in Richmond.
The children were reported missing after their father was found shot to death in his San Pablo backyard.
The father had full custody of the children. Police are searching for the mother, 35-year-old Alicia Ortez, but have not said if she is connected with the murder.
She's described as five feet five inches tall, 160 pounds with black hair and brown eyes.
A man was found shot to death at a San Pablo home Monday morning, and his three children and their mother are missing, authorities said.
The identity of the man who was killed has not yet been released.
A statewide Amber Alert was issued at about 8:15 p.m. for the woman and the three children.
Police are asking for the public's help in finding the mother, identified as 35-year-old Alicia Ortez from the San Pablo-Richmond area, and her children, Hugo Anguiano,, 12, Merari Anguiano,, 6, and Jenh Carlos Anguiano, 2. All three children are described as Hispanic.
Alicia Ortez is described as Hispanic with black hair and brown eyes, weighing 160 pounds at 5-feet-5-inches.
Police have not said whether Alicia Ortez is wanted in connection with the man's death and there has been no motive released in the killing.
No photos are available at this time. No vehicle description is available at this time.
Anyone with information about the incident or the whereabouts of the missing people are asked to call the San Pablo police at 510-215-3150 or the West Contra Costa Crime Stoppers Tip Line at 510-799-8255.
Stay tuned to NewsRadio KFBK and KFBK.com for updates on this developing story.