A fire that caused about $6,000 worth of damages at the Lawson Heights Mall on Thursday was an accident, according to the Saskatoon Fire Department.

The blaze was reported at about 7 p.m. CST, when the department responded with six crews.

When they arrived, smoke was showing from the roof of the mall in an area under renovation.

The fire department said it launched an "aggressive offensive" exterior attack from the roof, while simultaneously accounting for workers, who were moved to a safe location.

Fire crews attacked a fire at the Lawson Heights Mall from the roof. (Chanss Lagaden/CBC News)

The fire was confined and brought under control, with crews remaining on scene for some time to ensure the fire had not spread.

A fire investigator determined the fire was an accident caused by "hot works" — typically welding, grinding, or cutting with a torch, etc. — in preparation for demolition in that part of the building.