Passengers being re-screened after an evacuation at LaGuardia Airport's central terminal - April 16, 2013 (credit: Marla Diamond / WCBS 880)

NEW YORK (CBSNewYork) — The Port Authority gave the all-clear Tuesday afternoon after the upper level of the central terminal building at LaGuardia Airport was evacuated earlier in the day.

Port Authority spokesman Ron Marisco told the Associated Press the cause of concern was wires protruding from a fluorescent light fixture. According to the Port Authority, someone in the food court called 911 around 10:30 a.m., triggering the evacuation.

A United Airlines pilot was greeting passengers boarding his Denver-bound flight when the evacuation was ordered.

“At times like that, you don’t ask; you just do it. Get out of the airport,” pilot Raul Boerner told WCBS 880’s Marla Diamond.