Officeworks fire still smouldering in Qld

Police believe the fire at an Officeworks store south of Brisbane may have been deliberately lit. (Jono Searle/AAP PHOTOS) (AAP)

A suspicious fire that destroyed an entire Officeworks still smoulders more than 18 hours hours after breaking out in the store south of Brisbane.

Queensland Fire and Emergency Services say the blaze started while staff and customers were still present at the store on Kingston Road in Underwood about 8.40pm on Tuesday.