Updated

The Latest on turmoil caused at New York's Kennedy Airport after unfounded reports of gunshots being fired there (all times local):

5:45 p.m.

Authorities say travelers at New York's Kennedy Airport cheering and loudly celebrating Usain (yoo-SAYN') Bolt's Olympic 100-meter dash victory may have prompted ultimately unfounded reports of gunshots there.

That's among the possibilities being probed by investigators trying to determine what led to a series of evacuations at the airport Sunday night.

Investigators also are interviewing witnesses and reviewing surveillance footage to figure out what caused the chaos.

An internal New York Police Department briefing document obtained by The Associated Press on Monday says patrons started to act "extremely disruptive" after watching the Olympics.

The timing of Bolt's gold medal success roughly corresponded with an anonymous 911 call from a woman reporting gunshots in Terminal 8. Police say more than 20 people subsequently called 911.

Authorities scoured the terminal and determined no shots had been fired.

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2:22 a.m.

Two terminals at New York's John F. Kennedy International Airport are resuming normal operations Monday morning after reports of shots fired prompted evacuations and grounded and diverted flights.

The reports, which led to some frightening moments for fliers Sunday night, were later determined to be unfounded and the airport was given the all-clear.

Police evacuated Terminal 8 around 9:30 p.m. Sunday as a precaution after receiving 911 calls about shots fired near the departures area.

A short time later, police closed Terminal 1 after they said they received additional reports of shots fired in that terminal. A highway approaching the airport also was shut down.

There were no injuries reported. It was not immediately clear what led to the airport scare.