Sinn Féin are to hold a Bloody Sunday protest in the Market Square in Dundalk this evening at 6pm.
The decision comes after it emerged today that one former British solider is to be charged with the murder of civilians in Derry in January 1972.
Fourteen people were killed when members of the Parachute Regiment opened fire on a civil rights march.
Northern Ireland’s Public Prosecution Service considered whether there was sufficient evidence to bring charges against 18 former soldiers, one of whom has since died.
Relatives of those killed on Bloody Sunday and their lawyers met the PPS at 10am to be told of its decision.
Each was given a letter setting out the position in their case.
The families said they are disappointed that not all of those responsible are to face trial and will now give careful consideration to the reasons provided for decisions not to prosecute the other soldiers.
Director of the PPS Stephen Herron confirmed that one former soldier, referred to as Soldier F, will be prosecuted for the murders of James Wray and William McKinney.
He will also be charged with the attempted murders of Joseph Friel, Michael Quinn, Joe Mahon and Patrick O’Donnell.
Sinn Féin Dundalk said: “In light of the disgraceful verdict on the prosecution of 1 ‘soldier’ for Bloody Sunday, Dundalk SF are holding a protest at Dundalk Market Square this evening at 6pm – 6.30pm.
“We are asking that people bring something black even if it’s an umbrella or flag or scarf.”