UPDATE: One person killed 6 injured in multi-car collision on Hwy 403 in Mississauga

All lanes have now reopened after an early morning collision on the westbound lanes of Highway 403 in Mississauga that claimed one life and injured 6 others. 

Five of the injured were taken to hospital. 

OPP confirm they received calls about the accident ,which occurred on the WB lanes at Winston Churchill Blvd, just before 6:15 a.m.

Reports indicate the collision occurred as a car hit another two that were already stopped, one of which had slammed into a guard rail.

One of those two vehicles was set to be towed away when the 3rd car slammed into it.

 A witness told our media partner CP24 he saw the car approaching the original accident scene at a high rate of speed.

"Truck showed up to help him, that car showed up to help him, the guy, that Mercedez just came I guess flying, lost control, boom."  

Peel Regional Paramedics confirmed that the victim had been pronounced dead on scene.

(David Ritchie /CP24)

Reports also indicate that two of the injured needed to be extricated from their vehicles.

The accident has closed all westbound lanes of Highway 403 from Erin Mills Parkway over to Highway 407 for an investigation.

with files from CP24