The North's First Minister Peter Robinson and deputy First Minister Martin McGuinness spoke of their shock over the plane crash at Cork Airport today.
Mr Robinson said: "This is a terrible tragedy and my thoughts are with the families of the bereaved.
"My thoughts are also with the injured and I hope that they will make a full and speedy recovery."
The deputy First Minister said: "I am shocked at this news and want to convey my condolences to the families, friends and loved ones of those who have lost their lives in the plane crash.
"My thoughts are also with those who have been injured."
The North's Transport Minister Conor Murphy said he was in contact with his counterpart in the Republic in the aftermath of the tragedy.
Mr Murphy said: "My thoughts are with the families of those involved and I offer my sympathies to everyone affected.
"I have spoken to the Minister for Transport in the south, Pat Carey TD, and offered the support of my department to help in whatever way we can.
"I continue to be updated on the situation as more details emerge."
East Belfast MP Naomi Long, whose constituency includes the City Airport where the flight took off, said: "It is a very dark day for both Belfast and Cork.
"My thoughts and prayers are with the families of those who have been killed or injured, and I know that the whole community will be thinking of them at this difficult time, and would join with me in wishing those who have survived a full recovery."
Ulster Unionist leader Tom Elliott said: "Like everyone else in Northern Ireland I was shocked to learn that a Belfast to Cork commuter flight crashed this morning, resulting in a number of fatalities and injuries. This is a terrible tragedy."
DUP deputy leader Nigel Dodds raised the tragic events at Cork Airport in the House of Commons where he asked Westminster representatives to join him in passing on their thoughts to those involved in the tragedy.
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