A US Customs and Border Patrol computer problems hit several US airports on Monday, causing long lines at immigration checks, airport officials said.
"Please be advised, @CustomsBorder outage is nationwide. They are working to restore. Thanks for your patience," Miami International Airport said on its Twitter feed.
Los Angeles International Airport also said on its Twitter feed they were experiencing problems that were part of a nationwide Customs and Border Patrol outage.
Social media photos showed long lines at various airports where people were trying to go through immigration and customs
US Customs and Border Patrol officials were not immediately available for comment.