The Taoiseach Enda Kenny has called the Orlando shootings “an outrage”.
Mr Kenny signed a book of condolence in the Mansion House in Dublin this morning.
His message said that Ireland would stand by the American people and the LGBT community in the wake of the “senseless” killings.
He said: “It’s important to come here and sign the book of condolence arising from these senseless murders in Orlando.
“I have written here that Ireland stands in support of the American people in the wake of these senseless killings, and particualry with the LGBT community in the United States.
“And obviously our thoughts and prayers are with the families of the bereaved arising from this latest outrage.”