Several tanker cars caught fire after a Canadian National Railway train carrying crude oil derailed in northern Ontario, prompting officials to advise nearby residents to stay indoors and avoid consuming water from local sources.

CN said its crew reported the derailment to emergency services at about 2:45 a.m. ET Saturday. Police said the train was 30 to 40 cars in length and 10 cars went off the track four kilometres northwest of Gogama, Ont.

Some of the rail cars that caught fire entered the Mattagami River System, CN and police said. Residents of Mattagami First Nation were being advised not to consume water from their community source for the time being. Residents of Gogama and Mattagami First Nation were also being asked to stay inside until further notice due to possible smoke inhalation.

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