Newark , New Jersey ( CNN ) -- A Transportation Security Administration officer has been reassigned after Sunday 's security breach at Newark 's Liberty International Airport , according to the TSA . `` The TSA is reviewing the circumstances surrounding the incident , and we are making an assessment as to what disciplinary action will be taken against [ the ] officer posted at the exit in question , '' TSA spokeswoman Ann Davis said . `` For now , that officer is performing non-screening duties while we look at what happened . '' Davis confirmed Monday that the TSA had not been able to locate the individual who breached security , but there was no indication that the individual presented a serious threat , she said . `` We were able to eliminate that he was a risk to the airport by rescreening everyone and re-combing the airport to make sure he did n't introduce anything to the environment or hand anything off to anyone , '' she said . The incident Sunday evening forced the closure of a terminal for hours while authorities rescreened thousands of passengers . The security breach happened about 5:20 p.m. at Terminal C when a man walked through an exit on the public side to the secure `` sterile '' side for passengers who had cleared screening , according to the TSA . All passengers had been rescreened by early Monday , according to the TSA . Flights from Terminal C were grounded until the process was completed . Authorities reviewed video from airport cameras but were not sure whether the man was once on the sterile side and went back or whether he never went through screening , Davis said . The incident caused arrival delays and mainly affected Continental Airlines , which is the airport 's largest tenant . iReport : Passenger photographs massive crowd . CNN 's Alina Cho , who arrived at the airport Sunday night on a flight from Fort Lauderdale , Florida , described a hectic scene , saying many passengers who had boarded outgoing flights had to get off planes to be rescreened . `` I just saw one woman pleading with a gate agent , saying that she had two small children and a heart condition -- that she simply could not take this , '' Cho said . `` But of course , there will be no exceptions . '' Newark Liberty International Airport , about 15 miles from Manhattan , is the second-largest hub for Continental . The airport handles approximately 35 million passengers a year . CNN 's Susan Candiotti , Ross Levitt and Jamie Guzzardo contributed to this report .
Security breach Sunday evening forces closure of Terminal C for hours . Officer posted in area that was breached has been reassigned . Man improperly skirted security screening ; he was never found .