PHILADELPHIA (AP) – Authorities said a car fleeing a Philadelphia robbery scene and being chased by police jumped a curb and crashed into a crowd, killing three children under age 10 and gravely injuring a woman.

Police Commissioner Charles Ramsey said it happened Wednesday night in Feltonville, a neighborhood of row houses in North Philadelphia.

He said the incident began with two men stealing a motorcycle at gunpoint. He says one fled on the motorcycle and the other fled in a car.

When the car jumped the curb it became wedged between a house and a pole. The woman it hit is the mother of at least one of the dead children.

The police commissioner said, “It’s a tragedy.”

Police said the car driver was injured and arrested at the scene. They said the motorcycle rider was arrested.

at his nearby home.