Police have closed Highway 403 in both directions at Wayne Gretzky Parkway in Brantford after a piece of an overpass bridge fell onto the highway.
In a tweet, Brantford police said “a part of the bridge” fell onto the roadway.
OPP said the closure is expected to last for “an extended period of time” as police investigate a collision.
Motorists are asked to avoid the area.
There is no word yet on any injuries.