A U.S. Customs computer outage disrupted airport operations nationwide Monday night, according to officials.
The outage caused long lines and delays for those trying to enter the United States.
A spokesperson for U.S. Customs and Border Protection said in a statement that its processing systems at multiple airports were "experiencing a temporary outage."
"Travelers at some ports of entry are experiencing longer than usual wait times and CBP officers are working to process travelers as quickly as possible while maintaining the highest levels of security," the statement said.
It's unclear just how widespread the outage is, but customs delays were reported in Miami, Fort Lauderdale, Atlanta and Washington Dulles International Airport.
However, Miami International Airport tweeted saying the outage was nationwide.
Some systems have reportedly come back online.
U.S. Customs Border Protection spokesman Rob Brisley told CNN the outage lasted about an hour at the Atlanta airport.
Dozens took to Twitter to share photos of the long lines.
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