Monessen police have accused a 17-year-old boy of setting or attempting to set three fires Jan. 16 and 17.
The boy, who was charged as a juvenile and has not been identified, lives near the fire scenes, according to court documents.
The first fire occurred Jan. 16 at a building on 10th Street. No charges have been filed in that incident.
While firefighters were battling that blaze, the boy allegedly set a building on fire at 1220 Knox Ave.