A 40-year-old man was killed and others were injured following an explosion at a polymer company in a Montreal suburb.

Paramedics from Urgences-sante were called at around 11:30 a.m. to the Polymer Source building in Dorval, Que.

The ambulance service says the man was declared dead at the site.

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Two people were taken to hospital with injuries, while a third person refused to be taken to hospital. Urgences-sante did not provide an update on their condition.

A large contingent of firefighters could be seen outside Polymer Source, which describes itself online as a supplier of high-quality, research-grade polymers.

The province’s workplace health and safety commission is investigating.

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