A legacy body is seeking witnesses to the death of a milkman and his son during rioting linked to the 1981 hunger strikes.
The Independent Commission for Reconciliation and Information Recovery (ICRIR) is investigating the deaths of Eric Guiney and his 14-year-old son Desmond.
They died after their milk delivery lorry was attacked by stone throwers in north Belfast in May 1981.
It happened the morning after IRA prisoner Bobby Sands died on hunger strike - the first of 10 republicans to die in the prison protest.
The Guiney family has asked the ICRIR to look into the case and it is appealing for witnesses to come forward.
During the attack on the Antrim Road, the milk lorry crashed into a concrete lamp post.
Desmond Guiney died of his injuries three days after the incident. Eric died the day after his son's funeral.
Assistant Commissioner Amanda Logan is leading the commission investigation team and is asking for the public's help.
"The Commission is committed to delivering for all those who have come to us for help, and today the family of Eric and Desmond are uppermost in our thoughts.
"Any information you may hold, no matter how inconsequential it may seem, could be of critical importance to uncovering the truth.
"If you know anything about the circumstances that led to the deaths of Eric and Desmond, please share it with the Commission. All information will be treated in the strictest confidence.
"The Guiney family has waited more than four decades to learn the truth of what happened that day. At the Commission we will help them in every way we can, and I appeal to the public to assist us in this work."
The ICRIR continues to operate while the UK government enacts new legislation to replace it.
The new legacy arrangements were agreed in talks with the Irish Government and announced earlier this year.
The new legislation which is making its way through the UK parliament will see the ICRIR replaced with two separate bodies, one focused on investigations and one on information retrieval for families.
As part of the investigation into the Guiney case, posters will be distributed and there will be a leaflet drop in the area.
