Taoiseach Enda Kenny will meet with the families of the victims of the Berkeley balcony tragedy when they return to Ireland.
Mr Kenny yesterday signed the book of condolences for the six students who died in the accident and described the event as the "worst thing anyone can ever imagine".
He was greeted by Dublin Lord Mayor Christy Burke at the Mansion House before he went inside and left a message in Irish.
Afterwards, he said Diaspora Minister Jimmy Deenihan would do all he could to support the families in California and added he was thinking also of the family of Cork student Karen Buckley, who was killed in Glasgow in April.
"This is the worse thing that anyone can ever imagine. I just had (Scottish First Minister) Nicola Sturgeon down in Government Buildings and I think of Karen Buckley - a young woman who was taken away through other unfortunate circumstances. This is a multiple of that. It's a loss to our country," he said.
He added he was proud of the way Irish people had rallied to support the affected families.
He plans to meet with the grieving families when they arrive home.
"Yes, it is my hope to meet with the families whenever it is appropriate. But we have to make arrangements as to the sequence of things," he said.