1 dead in massive 30-vehicle crash on Highway 401 east.

One person has died following a massive, 30-vehicle crash on Highway 401 east of the city that spilled a toxic substance at the scene.

The Kingston General Hospital said that it received 29 patients from the crash scene, including 13 first responders who underwent decontamination and were held for observation as a precaution.

Snowy roads and whiteout conditions were likely factors in the crash, which was at one point upgraded to a “mass casualty response” and involved more than 30 vehicles — including about a dozen tractor trailers.