An electrical fault sparked the fire in an NBC camera on the 70th floor of 30 Rockefeller Center around 6:45 p.m., fire officials and a building spokeswoman said.
FDNY officials said a child was taken to New York Presbyterian Hospital with minor injuries, while five others refused medical attention at the scene. The age of the child was not available.
"There was a small fire last night from sparks emitted from one of our cameras at the top of 30 Rockefeller Plaza," an NBC spokesman said in a statement.
"We are grateful to the first responders who immediately contained the fire and evacuated the area. We are investigating what caused the incident."