The Transportation Security Administration (TSA) says it is pursuing disciplinary action against six baggage screeners at Newark Liberty International Airport, including some suspected of sleeping during part of their shifts.

The employees have been cited for alleged failure to follow procedures and have been suspended from screening duties while the cases proceed.

The suspensions come after the agency said earlier this week that another baggage screener at Newark is facing possible dismissal for allegedly failing on Dec. 22 to adequately check two bags that raised concerns, causing two planeloads of luggage to be rescreened.

AP wire services contributed to this report.