A written bomb threat was discovered on a flight from Seattle to Chicago, prompting US aviation officials to temporarily close Midway Airport.
Southwest Airlines’ Flight 202 landed without incident yesterday but the plane was not allowed to approach the terminal.
Instead, its 129 passengers and five crew members were taken by bus to a secure area where they met with investigators, said Wendy Abrams, a spokeswoman for the city’s aviation department.
Beth Harbin, spokeswoman for Dallas-based Southwest Airlines, said the bomb threat was in a written note found aboard the plane during landing.
The Federal Aviation Administration shut down all air traffic at the airport at about 1.15pm local time for more than 20 minutes.
Abrams said the closure caused only “minimal delays.”
The Chicago Police Department and the FBI’s terrorism task force searched the plane and its luggage but no bomb was found, said FBI spokesman Frank Bochte.
Investigators were trying to determine where the note originated from.