A freight train derailed on Montreal's South Shore Thursday morning, sending a cloud of white smoke drifting toward a residential area.

Water vapour pouring off the derailed CN train in Longueuil -- police have asked those in the area to stay inside, saying they don't know whether the fumes are safe. The fire department is on the scene, dousing the train as a precautionary measure. @mtlgazette pic.twitter.com/2hiId0liEV

A train derailed at the Lemoyne marshalling yard on Thursday before 9 a.m. in Longueuil. According Longueuil police (SPAL), there were no injuries and no other vehicles were involved in the accident. SPAL officers responded to the scene with the Service de sécurité incendie de Longueuil and Canadian National (CN).

People in a part of Longueuil, Que., were being asked to stay indoors with their doors and windows closed on Thursday morning after a train derailed, spilling an unknown quantity of hydrogen peroxide.

Emergency services are at the scene of a train derailment Thursday morning on Montreal's south shore, where they are urging citizens to stay away from the area.

People in a part of Longueuil, Que. were being asked to stay indoors with their doors and windows closed on Thursday morning after a train derailed in a train yard, spilling an unknown quantity of hydrogen peroxide.

Eight cars of a Canadian National train derailed today (Thursday, Nov. 14) in suburban Montreal, releasing a cloud of a potentially hazardous material and leading to a shelter-in-place order for nearby residents as well as area schools.

Longueuil police say it doesn’t initially appear anyone was hurt, but fire officials are dealing with a hydrogen peroxide spill