SIU investigating two-vehicle crash in Brampton

Ontario's police watchdog is investigating a two-vehicle crash in Brampton that sent four people to hospital.

The Special Investigations Unit says a Peel Region officer attempted a traffic stop early Saturday morning, but the vehicle fled and collided with a cargo van.

The SIU says the two men in the fleeing vehicle and two men in the cargo van were taken to hospital.

The agency is automatically called in to investigate reports of serious injury, death or sexual assault where police are involved.