PHILADELPHIA (CBS) — Philadelphia police are investigating after the body of a woman was discovered in Center City.

Police say a woman, believed to be approximately 50 years old, was found unresponsive around 10:30 a.m. Saturday along 500 block of South 5th Street in the Society Hill section of the city.

She was pronounced dead at the scene.

There was no initial word on a cause of death or on the identity of the woman.