Bishop Emeritus Edward Daly of Derry has died at the age of 82. Bishop Daly, who helped victims on Bloody Sunday in 1972, had been suffering from a long illness, the Diocese of Derry said.

Bishop Daly was a priest in Derry when British paratroopers opened fire on a civil rights protest march on January 30, 1972, killing 13 people. The killings helped to fuel Northern Ireland’s sectarian violence, in which some 3,000 people died.

The bishop became a hero by administering the Last Rites to victims on the streets amid the mayhem of the Catholic Bogside district. A photo of the priest waving a bloodstained white handkerchief as he tried to help dying 17-year-old Jackie Duddy became one of the event’s abiding images.