The McKinney Police Department said 6-year-old Jennifer Burns and 9-year-old Jessica Burns were safely located on Sunday evening.
The girls were last seen just before 6 p.m. Thursday at a restaurant near Central Expressway and Virginia Parkway, police said. Authorities said the sisters were at a supervised visit with their father and child protective services, who had temporary custody of them.
Police said that the girls' paternal grandmother, 60-year-old Jame Burns was a person of interest in their disappearance.
Burns was also located on Sunday and was taken into custody, according to police.
She faces two felony counts of kidnapping.
This investigation remains ongoing, police said.