Around 300 protestors, who opposed the planned loyalist 'Love Ulster' march, clashed with gardaí in Dublin city centre this afternoon.
The trouble broke out at 12.45pm at the junction of Parnell Street and O'Connell Street, just yards from where an estimated 800 marchers commemorating the victims of republican violence had gathered.
The 'Love Ulster' parade, due to follow a route from Parnell Square to Leinster House, never got underway.
About 300 protestors trying to stop the march from proceeding along the route broke the barriers and began attacking gardaí, photographers and journalists.
Missiles including cement blocks, rocks, pipes, glass bottles and firecrackers were thrown. A refuse skip outside the GPO was also set on fire.