clockwise from top left: Mirella, Ubaldo and Esmerelda Guerrero-Lopez
BOISE, ID (CBS5/AP) -
Authorities say an Idaho woman accused of taking her three children in a custody squabble has crossed the border and all four are in Mexico.
The FBI says that 35-year-old Bertha Sabala Guerrero, her 9-year-old son and two daughters, ages 7 and 5, crossed the border as early as Sunday evening.
Authorities say the children appear to be unharmed.
Guerrero lost custody in December after authorities say she left them with a woman she had just met. The children were placed in foster care.
Authorities say Guerrero picked them up for a 24-hour visitation Friday and failed to return them the following day.
Guerrero has family living in Phoenix and Mexico. The FBI said Monday that the investigation will continue, but Amber Alerts for the children will be canceled.
Authorities said Guerrero-Lopez has a home in Nevada and a history of drug abuse and child abandonment.
She is described as 5'1" tall, 139 pounds with brown hair and brown eyes.
Police say they may be traveling in a gray or silver 1986 Pontiac 6000 four-door sedan with Nevada license plate number 389XPR.
Copyright 2012 Associated Press. All rights reserved. KPHO (Meredith Corporation) contributed to this report.