BALTIMORE (WJZ) — A system outage caused issues for passengers flying internationally at multiple U.S. airports Friday evening, but not at Baltimore Washington International Thurgood Marshall Airport.

U.S. Customs and Border Protection tweeted a temporary outage with processing systems began causing a disruption for travelers around 5 p.m. As of around 6:30 p.m., the system was slowly coming back online.

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Officials said there is no evidence the outage was malicious in nature.

International travelers were being processed with alternative procedures, the agency said.

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“CBP officers are working to process travelers as quickly as possible while maintaining the highest levels of security,” CBP said in another tweet.

A passenger at Dulles International airport also reported significant issues for travelers there.

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Despite an earlier tweet warning passengers of possible delays, a BWI spokesperson said there were no delays being reported at the airport due to the CBP outage.