The family of Disappeared victim Kevin McKee are today giving him a Christian burial.
Kevin McKee was just 17 when he vanished from west Belfast in October 1972.
His body was found along with that of Seamus Wright (25), another Disappeared victim, in a bog in County Meath.
The discovery was made three months ago on June 25 during a search on the site for Joe Lynskey, a former monk who also went missing from west Belfast in the same year.
The so-called Disappeared were 16 people abducted and secretly buried by republicans in the 1970s and 1980s.
The requiem mass for Mr McKee is being held at St Peter's Cathedral on the Falls Road in Belfast.
Fr Michael Murtagh, former Rector of Clonard Monastery told mourners: "We are here to give Kevin McKee a Christian burial. This is happening 43 years late but it is still important that we do it.
"It is important for Kevin and for his family that they are given the chance to grieve publicly and acknowledge the awful tragedy his murder and secret burial was."
Mr McKee's disappearance took its toll on each family member, the priest said.
"We remind ourselves how this affected each of his family members, those living and those dead, especially his late mother Mary.
"We acknowledge 43 years of pain, of wondering, of uncertainty and not knowing what had happened.
"We acknowledge that at times there were very few to turn to and it was a lonely road for them to travel."
Mr McKee will lie beside his mother at Blaris cemetery in Lisburn, Co Antrim.
Additional reporting PA