BBC News
Dublin Airport Authority (DAA) has said "over 1,000 passengers" missed their flights on Sunday after lengthy queues.
Ireland's minister for international transport is due to meet the airport's chief executive on Monday to discuss queues which caused hundreds of people to miss their flights on Sunday.
Hildegarde Naughton and Ireland's Minister for Transport Eamon Ryan have expressed their "deep unhappiness".
The DAA apologised and said customers would not be left "out of pocket".
"Yesterday morning when we opened security in terminal one and terminal two, we clearly didn't have enough security lanes open due to resourcing challenges, and at the moment any absenteeism impacts on our ability to operate lanes," Mr Cullinane added.
