A security issue delays a Northwest Airlines plane bound for Minneapolis St. Paul International Airport todayA spokesperson for Northwest Airlines says the plane leaving Denver International Airport was delayed due to a security issue.Officials at DIA say a passenger on the flight said he had an explosive on the plane just as the airplane was pulling away from the terminal.The plane was towed to an area away from the terminal so authorities could investigate.Denver police confirm that one person was taken into custody and no explosives were found.A spokesperson for Northwest Airlines says all 140 passengers on the plane were re-screened before being put on another flight.