Former leader of Republican Sinn Féin Ruairí Ó Brádaigh has died.
Republican Sinn Féin president Des Dalton said the group "salute his memory and pledge our resolve to honour him by continuing his work".
Sinn Féin leader Gerry Adams said: "Whatever differences we may have shared on political matters Ruairí was a life-long activist who was committed to his principles."
Ruairi Ó Brádaigh was a former chief of staff of the IRA in the 1950s, and was a TD for Longford Westmeath from 1957 to 1961.
He founded Provisional Sinn Féin in 1970 and Republican Sinn Féin in 1986. The latter organisation was the political wing of the Continuity IRA.
Mr Ó Brádaigh was a vehement opponent of the Good Friday Agreement. He retired as president of Republican Sinn Féin in 2009.