Montreal police are investigating after a Senneville woman was injured when a homemade explosive went off in her mailbox Wednesday evening.

At around 7 p.m., police received a 911 call about a 68-year-old woman who had been hurt in Senneville, on the western tip of the island.

Police say a bomb went off when she opened her mailbox, which is at the end of a long driveway, near the street.

She sustained minor injuries to her upper body but police say she didn't take an ambulance.

Police spokesperson Const. Véronique Dubuc told CBC that the explosion didn't release any toxic substances into the area, and people in the neighbourhood have nothing to fear.

Following the incident, a SWAT team arrived on site with a robot to destroy the bomb. Two canine units were also called in to ensure no other explosives were around.

The police arson squad took over the investigation and met with witnesses.