Bloody Sunday in Derry occurred fifty years ago today.
The gunning down of civilian civil rights marchers was one of the most shocking in modern Irish history, and it reverberates to this day.
Taoiseach Micheál Martin was among the many who gathered to mark the anniversary and remember the dead and injured.
He said there must be no amnesties for Troubles killings and the law must apply equally to everyone. Martin was referring to British government plans to effectively bring an end to Troubles era investigations and prosecutions.
Martin, according to an RTE report, was speaking after meeting families of those killed on Bloody Sunday at the event to commemorate the anniversary of the killings.
Mr. Martin was among a number of political leaders from both sides of the border to lay wreaths at the Bloody Sunday memorial.
Thirteen civilians were shot dead when British soldiers of the Parachute Regiment opened fire on people who had been attending a civil rights rally on January 30, 1972.
They were Patrick "Paddy" Doherty, Gerald Donaghey, John "Jackie"Duddy, Hugh Gilmour, Michael Kelly, Michael McDaid, Kevin McElhinney, Bernard "Barney" McGuigan, Gerald McKinney, William 'Willie' McKinney, William Nash, James "Jim" Wray and John Young.
A 14th person, John Johnston, who was wounded on the day, died several months later. His name is included on the official Bloody Sunday monument.
A further 15 people were wounded when the troops opened fire on what was a peaceful civil rights march.
