An explosion at the premises of a Dorval business left one dead and several injured late Friday morning.

The explosion occurred shortly after 11 a.m. at Polymer Source, a company specializing in research and development in the polymer industry located on Avro Avenue, in an industrial sector of Dorval.

According to the authorities, the explosion took place in a laboratory during the handling of chemicals.

One of the workers is said to have suffered a horrific chest injury in the blast. His death was pronounced on the spot.

A few other workers reportedly suffered minor injuries.

Due to the presence of chemicals, the firefighters intervened with great caution inside the walls of the company.

At the beginning of the afternoon, the intervention was still in progress.

Inspectors from the Commission for Standards, Equity, Health and Safety at Work (CNESST) were to go to the scene to try to establish the circumstances of this fatal work accident.