Michelle Doorley principal at the National School at Ballinkillen, Co Carlow reading a statement in regards to the deaths of five-year-old Ruairí Chada and his 10-year-old brother Eoghan, pupils of her school. In the background are teachers and staff. Photograph: Dylan Vaughan.

Gardaí are treating as a murder inquiry their investigation into the deaths of Ruairí (5) and Eoghan (10) Chada after postmortems on their remains fou(...)