The leader of Sinn Féin has initiated legal action against RTÉ.
Mary Lou McDonald has begun legal proceedings against the national broadcaster in the High Court.
It is understood the action relates to a radio interview about a rally organised by the National Women's Council outside Leinster House in early March.
A spokesperson for Sinn Féin said: "This is now a matter in litigation before the courts and it would be inappropriate to comment."
Ms McDonald is being represented by McCartan and Burke solicitors.
A spokesperson for RTÉ said it does not comment on legal matters.