PHILADELPHIA (AP) – Police say four children ages 9 to 13 were rescued from the basement of a Philadelphia home where authorities suspect they’d been locked since the day before.

Investigators say one of the children used a cellphone to dial 911 and crews went through a second-floor window to reach them on Sunday.

The 13-year-old boy, 12-year-old girl, 10-year-old girl and 9-year-old girl were taken a hospital for evaluation.

Police say they are trying to track down the children’s mother.