A shooting on Highway 401 early Saturday morning shut down eastbound lanes of the highway in Mississauga well into the afternoon.

OPP have since reopened all lanes to traffic, but continue to investigate.

OPP say two separate vehicles were travelling east of Winston Churchill Boulevard, when gunfire erupted, causing one of the vehicles to lose control and come to rest on its side.

Police initially responded to reports of a rollover crash just before 4:15 a.m.

According to Sgt. Kerry Schmidt, that vehicle is riddled with bullet holes. The second vehicle involved in the shooting fled the scene.

Schmidt says it is unknown at this time if this was a targeted shooting or an incident of road rage.

“Shell casings and bullet fragments have been located up and down the highway already,” says Schmidt. “We certainly do not want to have gunfire happening out on the highways.”

Investigators are on the hunt for an unknown red car, believed to have made contact with the barriers on both sides of the highway. As a result, the car would have considerable damage to its front bumper, and left and right side, as well as a flat tire.

The overturned vehicle was carrying five men, who escaped injury, and are currently providing statements to police.

In the meantime, OPP forensic identification unit, highway safety division crime unit, and members of the Port Credit detachment continue to canvass the area for evidence.

“We will be checking the area here for physical evidence and video evidence as well,” says Schmidt. “There are several buildings in the area that may have cameras that could provide some information.”

Shooting on #Hwy401 EB near Winston Churchill Blvd. 2 vehicles involved searching for a U/K red vehicle https://t.co/vaRgvqEYkT — Sgt Kerry Schmidt (@OPP_HSD) February 17, 2018

Anyone with information is asked to call the Port Credit OPP at 905-278-6131.