Quebec's police watchdog is investigating a fatal train collision in Dorval, Que., that occurred shortly after the victim had interacted with Montreal police.

Emergency services received a call about a train accident at around 11:40 p.m., according to a news release from the Bureau des enquêtes indépendantes (BEI).

The victim appears to be the same man that police officers from the Pointe-Claire station had approached about 20 minutes earlier about public intoxication, the BEI said.

The man had left after a discussion of a few minutes with officers of the Service de police de la Ville de Montréal (SPVM).

The BEI did not specify where the interaction or the train collision took place, but police tape was blocking off a section of tracks near the Via Rail station in Dorval overnight. The train involved wasn't a VIA Rail train, the company confirmed.

Five investigators with the BEI will look into the circumstances surrounding the man's death. Investigators are asking any witnesses with information to come forward.

The police watchdog is mandated to investigate when a civilian is seriously injured or killed during a police intervention.

The Transportation Safety Board was notified and it is "gathering information and assessing the occurrence" according to a spokesperson.