The Department of Foreign Affairs said today the final death toll of Irish people in Tuesday's attacks in the US was yet to be confirmed.
Three Irish people have been confirmed dead so far by the Department, as well as Father Mychal Judge, the Irish-American chaplain of the New York Fire Department.
The three Irish fatalities were all on the United Airlines flight which crashed into the south tower of the World Trade Centre.
They were named as Ms Ruth Clifford McCourt (44) and her daughter Juliana (4), from Cork, and Mr Paddy Currivan (52), an engineer from Dublin.
Father Judge (68), was killed by a piece of falling masonry from the towers while giving the last rites to a firefighter.
Among those still missing are stockbroker Ms Ann Marie McHugh (35) from Tuam, Co Galway, who worked on the 89th floor of the south tower.
Also missing are construction workers Mr Kieran Gorman (35), from Carrowcurragh, Lavagh, Co Sligo; Mr Martin Coughlan (53), from Cappawhite, Tipperary; and Mr Seán Canavan (39).