The airport confirmed the account, stating that "customs systems are down right now nationwide, but they are starting to use backup systems".
The U.S. Customs and Border Protection office said officials are working to address the situation while officers are using "alternative procedures until systems are back online".
Customs officers at Dulles International Airport near Washington haven't been able to process passengers arriving from outside the USA since 3:18 p.m. local time, said Micah Lillard, a spokesman for the Metropolitan Washington Airports Authority.
A nationwide computer systems outage is causing massive delays Friday at South Florida airports and ports.
'Officers are processing passengers manually so please check with your airline for the latest status of any flight impacts.
Jackie Chan sparks outrage over comments on Hong Kong protests
Protester Ah Lok, 22, shows injuries he suffered during clashes with police in Hong Kong on August 14, 2019. They clashed violently with police on Tuesday evening.
People at Newark Airport took to Twitter to vent their frustrations Friday evening.
Passengers reported that they've spent more than two hours standing in line at the Washington Dulles International Airport. Thanks for your patience'.
"We're going to miss our connection", tweeted Barrie King at the Twitter page for Hartsfield-Jackson Atlanta International Airport.
The cause of the outage was not immediately clear and there was no word as of 5:45 p.m.as to when the problem would be fixed.