Updated

The Arizona Department of Public Safety is currently on the scene of a two vehicle fatal collision involving a school bus that occurred just after 6 a.m. Tuesday on the southwest side of Tucson.

The collision occurred on State Route 86 at Ryan Field.

There are three confirmed fatalities. There are no fatalities on the school bus. Eastbound traffic is being diverted onto Valencia Road.

Westbound traffic is being turned back eastbound.