Cambior Inc.: Announcement.

Business Editors

LONGUEUIL, Quebec--(BUSINESS WIRE)--March 3, 2003

Cambior (AMEX:CBJ) (TSX:CBJ) reports that a breakdown of the production hoist occurred during the weekend at the Doyon mine located in northwestern Quebec. The hoist is now being dismantled in order to evaluate potential damage to the bearings and the central shaft as well as the temporary impact on gold production from the mine. Repairs to the production hoist could last between 2 to 6 weeks depending on the results of such evaluation.

It is anticipated that the Doyon mill will continue its activities at full capacity by processing 1,600 tonnes per day from the Mouska and Doyon underground mines and 2,000 tonnes per day from the low-grade ore surface stockpile (1 g Au/t) located near the Doyon mill. Cambior will use the service hoist to raise ore to the surface and supplement this by truck haulage to the surface using the Doyon mine's ramp system.

The Doyon mine will re-evaluate its manpower needs as a result of this incident. A temporary layoff of manpower may be required during the repair period. The Company's insurers have been advised of this incident. Further details will be publicly disclosed once the full extent of the damage to the production hoist is known.

Cambior Inc. is an international gold producer with operations, development ...