Photo by Amy Rogers-Boterman

Emergency responders by ground and air assisted police and fire crews at an accident in Thunderbird Farms Sunday afternoon.

Witnesses report two vehicles, a mini-van and a black sedan, were apparently involved in the collision near the Papago and Ralston Roads intersection.

One witness said over five people were involved in the accident, including children. A medivac helicopter and ambulances arrived on scene, but it is unknown the number and severity of injuries.

First responder spokespersons could not be immediately reached for comment.

This is a developing story. Follow InMaricopa.com for updates.