Gardai have renewed their appeal for information about Philip Cairns - 35 years on from his disappearance.
The schoolboy vanished as he walked to Coláiste Éanna in Ballyoran, Co Dublin after lunch on October 23, 1986.
He left his home at 1.30pm to walk the short distance back to class - but was never seen again.
Six days after he vanished, Philip's bag was discovered in a lane that links Ann Devlin Road and Ann Devlin Drive near his school. Several of his books were missing.
The 13-year-old was described as being 5’2” in height, with short black hair. When last seen he was wearing his Colaiste Eanna school uniform, a grey jacket with black shoulder corners, grey school trousers, grey shirt and school pullover.
A garda spokesman said: "There may be persons who may have information in relation to Philips’ disappearance or Philip’s school bag and for whatever reason did not come forward. Following the passage of time and changing circumstances these people may now be in a position to assist us.
"There may be persons, who were young at the time of Philips’ disappearance and not in a position to provide An Garda Síochána with information, who may now be able to come forward.
"An Garda Síochána want to reassure anyone who comes forward that they will be treated sensitively and discreetly by investigating Gardaí, Even the smallest piece of information, which may seem insignificant, may assist the investigation.
"Anyone with information is asked to contact Rathfarnham Garda station on 01 666 6500, the Garda Confidential Line on 1800 666 111 or any Garda station."
