The Special Investigations Unit has invoked their mandate following an incident in Mississauga Saturday afternoon.
Peel police were called to Pettigrew Crescent near Winston Churchill Boulevard and The Collegeway around 2:20 p.m.
Few details are known about what led to the incident, but the SIU confirms there was a police-involved shooting.
Police said one man fled the scene. The SIU is still working to determine if anyone suffered any injuries.
Bullet holes in a mini-van on the street were covered by a yellow tarp.
Police are asking anyone who saw anything suspicious to contact them.