An apparent cyberattack disrupted internet, phones, email and other systems at Washington's Seattle-Tacoma International Airport. Airport officials were forced to enter passengers' data manually due to the internet outage. The outage did affect the Port of Seattle's baggage sorting system, prompting airlines to warn passengers to avoid checking in bags to prevent potential delays. It also warned travellers to allow extra time at the airport and to use airline mobile applications to get boarding passes and baggage tags when possible. Many travellers faced security lines that were longer than normal and long waits at baggage claims. Terminal screens were also out throughout the airport, making it difficult for some to determine their assigned gate.