A motorcyclist is dead after a collision involving three other vehicles on the QEW.
It happened in the westbound lanes near Appleby Line, around 6 this evening.
Three other vehicles and the motorcyclist were involved in the crash.
No one else was hurt.
It's still unclear at this time if alcohol or speed were factors in the crash.
OPP Constable Taylor Konkle tells NEWSTALK1010 traffic was heavy at the time.
"It was stop and go, so we are going to be looking into the factors of all the vehicles, to see how fast all the vehicles were going at the time of the collision, but that has all to do with our reconstruction - our team right now on scene."
For several hours now, traffic has been diverted off the highway at Appleby Line, as the OPP investigates the crash.
Konkle says they hope to complete the investigation and reopen all westbound lanes to traffic around at least midnight tonight.