(NEW YORK) -- A computer outage triggered delays at one of the country's busiest airports, during one of the busiest travel holidays of the year.
A server crash at New York's John F. Kennedy International Airport stalled operations at Terminal Seven Sunday, according to Neal Buccino, a spokesman for the Port Authority.
Buccino said the problem started at 4 p.m. Sunday when a computer system used to check in passengers began to malfuntion.
He added the outage was not a TSA issue, but caused by a private server.
Some customers tweeted that they were being checked in by hand, and issued hand-written boarding passes instead.
Another customer tweeted a letter they received from Cathay Pacific airlines, saying the computer check-in system was affected by an outage at Verizon.
Roughly 1,500 people were waiting to be checked in during the height of the crash, according to Buccino.
Buccino said the Port Authority Police Department had deployed officers to monitor the situation.
British Airways, which operates Terminal Seven, said in a statement issued to ABC News that the problem had been resolved overnight and apologized for the system outage.
"We apologize for any inconvenience caused to our customers last night, as a result of a system outage at New York JFK airport," according to the statement. "The system providers worked overnight to resolve the issues, and things are now running again as normal."
Copyright © 2016, ABC Radio. All rights reserved.