Travellers are being advised to expect delays as a widespread outage hit the system used by the US Customs and Border Patrol uses to check incoming travellers' passports.
The outage reportedly occurred shortly after 3 p.m. EDT. "CBP officers are working to process travelers as quickly as possible while maintaining the highest levels of security", the agency said.
In a tweet, Los Angeles International Airport said that U.S. Customs and Border Protection systems are experiencing an issue that "appears to be impacting multiple airports".
Seattle-Tacoma International Airport, which experienced the failure of its processing systems as well, reported that the CBP hardware is back online.
Enormous lines were also seen at JFK Airport in several videos posted to Twitter.
The lines at major airports, including JFK, LAX and Dulles, are insane.
The outage caused people at Terminals B and C at the airport to be processed manually as they went through customs which led to delays, according to a tweet from the airport. "Airport operations remain normal at this time". "People were backing up on the escalator and falling over each other". They are processing passengers manually until the system comes back online. "Thanks for your patience", JFK Airport tweeted.