A third person has died from injuries they sustained after an explosion at a plant in Quebec’s Eastern Townships last week.

Marc Couture, a worker from the plant, died in a Montreal hospital Saturday.

Couture suffered burns on 90 per cent of his body and was in an induced coma, said hospital spokeswoman Sylvie Robitaille.

Two other people were earlier found dead in the charred ruins of the Sherbrooke plant.

Another three people remain in hospital with non life-threatening injuries, said Robitaille. In total, 18 people were injured in the blast.

Thursday’s powerful explosion occurred at a production plant belonging to Neptune Technologies & Bioressources.

The cause of the deadly blast is still unknown. Following the incident, the company --which produces health products – promised to co-operate with investigators.