USA border officers "continued to process worldwide travelers using alternative procedures at affected airports. while maintaining the highest levels of security", the Customs and Border Patrol computer agency said in a statement, adding that "there is no indication the service disruption was malicious in nature". DFW International was one of the airports affected.
Worldwide travelers at multiple airports took to social media Monday evening express their displeasure after they faced delays and long lines during processing.
San Diego fliers may have experienced airport lines and delays Monday evening due to U.S. Customs and Border Protection system outages at various airports across the country.
Customs and Border Protection said its officers continued to process travelers using "alternative procedures" during the outage. All the airports involved are now back online, according to CBP, though some are still experiencing effects from the outage.
CBP said it "took immediate action to address the technology disruption".
CBP said travelers at "some ports of entry experienced longer than usual wait times". The agency didn't say what caused the problem, but said "there is no indication the service disruption was malicious in nature".
Other airports, including Denver International Airport, also said they were affected. Delays were caused because the CBP-controlled passport-processing systems were down.