11/27/2013 12:35 EST | Updated 01/27/2014 05:59 EST

Highway 21 Pileup: Fog Causes Dozens Of Vehicles To Collide In Strathcona County (PHOTOS)

danger driving at the heavy...
SHERWOOD PARK, Alta. - Police say an Edmonton-area highway where dozens of vehicles collided in heavy fog has reopened.

RCMP say debris has been cleared and about 40 vehicles, including semi-trailer rigs, have been towed from Highway 21 south of Sherwood Park.

Only minor injuries were reported.

Police say visibility was down to zero at the time of the chain-reaction crash.

Motorists are still being advised to be careful when driving through lingering fog patches.

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Strathcona Pileup