McKINNEY, Texas (KTEN) — Two McKinney sisters who had been the subject of an Amber Alert since early Friday are safe; their grandmother and father are in jail.

McKinney police said 60-year-old Jame Burns was taken into custody in Richardson on Sunday evening. She is facing two felony counts of kidnapping along with child endangerment and drug charges.

Justin Burns, 34, the non-custodial father of the six and nine-year-old girls, was arrested Saturday on kidnapping charges.

Investigators said the girls had been taken from a McKinney pizza restaurant on Friday, prompting an Amber Alert and a search for Jame Burns and her vehicle.

Police said an investigation into the incident is ongoing.

"We would like to thank our community and our media partners for helping us get the word out about the Amber Alert," police said in a tweet Sunday night.