An Amber Alert has been issued for three girls who police say are missing after their mother was found dead in Saginaw.

Police say they're investigating the mother's death as a homicide, and they believe the girls ages 3, 5 and 9 were abducted by their estranged father.

The mother's body was found Monday night.

Police identified the father as 35-year-old Jose Angel Olguin. They say he was believed to be driving a yellow Buick Skylark.

Anyone with information was asked to call police.