VIDEO: Firefighters battled a brush fire Tuesday afternoon in Los Angeles' Griffith Park that burned on a hillside below the Griffith Observatory. About 6 acres burned, but firefighters protected the Observatory and nearby homes. A realtor at a property in the area said she called 911 to report smoke was rising from a hillside to the south of Griffith Observatory at the heart of the 4,300-acre park. The fire was reported at about 2:30 p.m. in the 2600 block of North Nottingham Drive. Summer Parker told NBCLA that painters at the property notified her that a man appeared to have set a fire on the nearby hillside. Details about the cause of the fire have not been confirmed by fire officials. LAPD said a man was detained near the site of the fire.