The Spokane Fire Department is actively investigating the commercial building fire that occurred at 821 W. Riverside Ave. on Saturday, November 26. The cause of the fire has been determined to be arson.

Fire investigators are urging community members to please report any information they believe may be related to arson to the Arson Alarm Hotline at 1-800-55-ARSON (27766). A reward may be provided for information resulting in an arson conviction. Persons providing information may remain anonymous.