(Oxford)---Miami University is asking the Ohio Fire Marshal's office to investigate the cause of Monday's dorm hall fire at Swing Hall on the Oxford campus. The fire caused damage to the attic and roof on the northwest corner of the building, which was dedicated in 1934. Firefighters from five area departments battled the flames. One firefighter was treated for heat exhaustion. No one was staying in the building at the time, since the university is on summer break.