FORT PIERCE, Fla. -- A 74-year-old man walked onto the campus of a Fort Pierce middle school and fatally shot himself near the bus pickup area after hours, according to St. Lucie County school officials.

School officials do not believe any students and faculty at Dan McCarty School were around when the incident occurred Tuesday evening. The man's identity has not been released, pending notification of next of kin.

Dave Morris, director of security for the county, said the man is not believed to be a current or former employee of the school. The school teaches students in grades three through eight.

Officials say a motorist passed the school, noticed a man slumped under a tree and notified authorities. Morris said a small caliber revolver was found near the body.