The Transportation Security Administration has moved to fire six bag-screening officers at Logan International Airport for violating inspection procedures for checked luggage and suspend 14 others for inattention to duty, the agency said.

The action was triggered by a routine audit that showed some officers were not paying close attention to computer monitors that display the contents of each bag as they are screened by an explosives detection machine, according to the TSA. The screeners were distracted by their cellphones and other electronic devices.