A man on the flight attempted to open the plane's exit doors during the flight, a spokesperson for the Port of Seattle Police Department told CBS News.

The All Nippon Airways flight was traveling from Japan’s Haneda Airport in Tokyo to George Bush Intercontinental Airport in Houston on Saturday when a passenger became “unruly,” according to the airline, which did not provide any details. Online records show that Flight 114 departed from Tokyo at around 10:33 a.m. local time.

The man was prevented from opening the emergency doors by two military veterans who were passengers on the plane.