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Crews clean up a derailed cargo train in Repentigny, Que., on Monday, July 6, 2026. THE CANADIAN PRESS/Christopher Katsarov

Safety board says it’s too soon to determine cause of Montreal-area train derailment

Jul 7, 2026 | 3:19 PM

REPENTIGNY — The Transportation Safety Board of Canada says it’s too early to determine how 49 CN railcars derailed on Sunday near Montreal.

In a news release, the independent agency confirms that no dangerous goods were released from the cars and that no injuries were reported.

It says investigators are collecting information including train handling and track conditions, and analyzing data from locomotive voices and video recorders.

The agency says a CN Rail train travelling from Joliette, Que., was rolling southward when it derailed at the edge of a residential area of Repentigny, Que., northeast of Montreal, around 5 p.m.