OPP close all Toronto-bound lanes in St. Catharines after ten vehicle collision

The Ontario provincial Police (OPP) have blocked all Toronto-bound lanes due to two collisions involving ten cars.

ROAD CLLOSURE: #QEW Toronto bound lanes closed at Niagara Street in St. Catharines due to a multi-vehicle collision involving two tractor trailers and four vehicles, unknown injuries at this time. Burlington OPP on scene. Please avoid the area and plan alternate routes. pic.twitter.com/iOwe5y5fY3

— OPP GTA Traffic (@OPP_GTATraffic) July 28, 2025

Officers say the first crash happened under the overpass near Niagara Street and involved three cars.

Police confirm that one person has been taken to hospital from this collision with minor injuries.

After the first crash blocked two lanes of traffic, a secondary crash happened between two tractor trailers and five vehicles.

Authorities say they are still assessing the injuries in the second collision but they do not believe any injuries to be life-threatening.

Authorities say the second crash happened near Welland Avenue and two people have been brought to hospital but the severity of the injuries have not been confirmed.

All Toronto-bound lanes at Niagara Street in St. Catharines are closed and police advise using alternate routes.

This is a developing news story. More to come. 

READ MORE: One person killed following three-vehicle collision in Milton