President Higgins led a tribute to Garda Colm Horkan, who was shot dead in Castlerea, Co Roscommon.
The national flag was flown at half-mast at Áras an Uachtaráin, as a mark of respect to Det. Garda Horkan, and the President observed a minute’s silence at the Peace Bell.
Sergeant Sinead Riley, Sergeant-in-Charge at Áras an Uachtaráin, rang the Peace Bell at the start and end of the memorial ceremony.
