INDIANAPOLIS (CBS/AP) — The Federal Aviation Administration says a United Airlines flight was diverted to Indianapolis because of a pressurization problem.

FAA spokesman Lynn Lunsford says the flight aboard an Embraer E145 headed from Charlotte, North Carolina, to Chicago’s O’Hare International Airport was diverted to Indianapolis International Airport on Sunday morning.

READ MORE: Accused Teen Gunman's Parents Charged In Oxford High School Shooting

“The crew followed procedure to safely bring the aircraft to a lower altitude and land in Indianapolis because of a pressurization issue,” said a spokesman for ExpressJet, which operated the flight for United. “Two customers requested to be checked by medical personnel and were cleared to continue their travels.”

READ MORE: Chicago Elite Classic Returns

Lunsford says the FAA will follow up with the airport to determine the cause of the pressurization problem.

(Copyright 2014 CBS Radio Inc. and its relevant subsidiaries. CBS Radio and EYE Logo TM and Copyright 2015 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed. The Associated Press contributed to this report.)

MORE NEWS: Keri Hilson Says 'Hip Hop Family Christmas' Is All About 'Honoring Your Family, Not Living For The World'