Firefighters in Prince Albert were called to the Saskatchewan Penitentiary for a reported fire in the prison administration building on Sunday.
Crews were called to the scene around 10:20 a.m., according to a Facebook post from the Prince Albert Fire Department.
Firefighters searched the building, which they say was filled with light smoke. They eventually discovered the source — a broken belt found on the air handling unit.
Maintenance personnel shut the unit down for repair, the fire department said.
No one was injured and no property was damaged.