The Top of the Rock, the observation deck at Rockefeller Center, opened to the public as usual at 8 a.m. Monday -- hours after being evacuated due to a camera fire that injured five adults and a child.

An FDNY spokesman said Monday the cause of the fire remains under investigation.

The child, whose age and identity was not released, was transported to New York-Presbyterian Hospital in Manhattan with "minor burns," the FDNY said. The fire department spokesman said the five adults all declined medical treatment.

Officials said more than 60 firefighters responded to the scene after a call at 7:43 p.m. Sunday, reporting the fire. Authorities said the injured were burned by falling embers from a stationary camera operated by NBC.

On Sunday night, FDNY spokesman Khalid Baylor said authorities were not classifying the incident as "suspicious," but could not specify what sparked the camera blaze.

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In a video from the scene posted online, white smoke could be seen coming from the roof of Rockefeller Center.

A dozen FDNY units were called to the scene, bringing the fire "under control" by 8:36 p.m., he said. Additional details were not available.

The observation deck is open to the public daily from 8 a.m. until midnight, according to the Rockefeller Center website.