A Dublin-based Spanish waiter killed his partner and two Irish-born children in a murder-suicide in Poland just days before Christmas.
Two Dublin schools have expressed their shock at the news.
Victor Marin Del Sol's three children spent a year in schools in Rathfarnham, before they moved to Poland with their mother.
The Irish Independent reports that Marin Del Sol flew to Poland to spend time with them just before Christmas.
He killed his two young sons and then waited for his partner, Ewelina Szwarc, to return home before killing her too.
The two brothers, aged nine and seven, were born in Ireland.
The couple's 11-year-old daughter managed to flee the scene.
Marin Del Sol is believed to have then taken his own life.
Reports in Poland say the alarm was raised in the town of Pyrzyce when the daughter alerted neighbours.
The principal of Scoil Naomh Padraig told the paper that they will be remembered as 'lovely, happy children'.
Polish police are continuing their investigation.
Anyone affected by issues raised in this article can contact The Samaritans on 116-123 or e-mail jo@samaritans.ie
