PHILADELPHIA (CBS) — Police are investigating an alleged sex assault of a young girl in Southwest Philadelphia.

Authorities were called around 2:15 a.m. Sunday to a home along the 5700 block of Warrington Avenue in the Kingsessing section the city.

Police say a 5-year-old girl was taken to Children’s Hospital of Philadelphia for evaluation and treatment.

Investigators say a suspect was taken into custody.

There was no immediate word on charges.