Emergency services were called to a Hasp Street business in Seventeen Mile Rocks shortly after 5pm on Friday following reports of a fire.
An emergency was declared just after 5.50pm,with boundaries imposed encompassing Seventeen Mile Rocks Rd,Oldfield Road and Staple Street.
“Members of the public are advised to avoid the area and those within the exclusion zone are asked to remain indoors until further notice,” police said in a statement at the time.
That declaration,under the Public Safety Preservation Act,was revoked about 1am on Saturday,however a crime scene remains in place while investigations continue.
-AAP