Fire Reported in Griffith Park [Updated]

A quarter-acre brush fire has been spotted in Griffith Park, the Los Angeles Fire Department is reporting. At 9:25 a.m., a call to dispatch alerted officials to the blaze "north of Golf Course behind Zoo."A few minutes later, an L.A. County Fire helicopter in the area confirmed the fire, estimating its size. Staff from the L.A. Zoo, which has not opened, says the fire is visible near "Mineral Wells."
[Update: Another helicopter on scene is saying that the fire is not in brush, but possibly burning in a structure. Update 2: The fire, confined to a small structure, was knocked down, 29 minutes after it was first reported.]