IRSP members from across Ireland travelled to west Belfast for the party's annual Easter Rising commemoration.
The parade made its way along the Falls Road to Milltown Cemetery yesterday where this year's main address was given by party spokesman, Ciaran Cunningham.
He spoke to those attending about the case of INLA men Noel Little and Ronnie Bunting who were shot dead in west Belfast in 1980.
Some believe both men were killed by members of the SAS, although the attack was claimed by UDA.
Last month the Irish News revealed that Secretary of State Karen Bradley had issued a certificate transferring the case from Attorney General for Northern Ireland John Larkin to London based Advocate General for Northern Ireland and Tory MP Jeremy Wright.
"We wish the Bunting and Little families well in their ongoing respective legal struggles and pledge our future support," Mr Cunningham said.
"Indeed, we pledge support for all such long-suffering families in their fight for truth and justice for their loved ones."
He also spoke about republicanism and the European Union which he branded "a rotten capitalist institution which, contrary to claims of many, had not delivered workers rights, has not delivered human rights and has not delivered prosperity".
