A 'well known' couple and their son were stabbed to death in a frenzied attack at their home before the suspected killer told a neighbour: 'Sorry for all the screaming and shouting. It's over now.'

Mark O'Connor, 54, his wife Louise, 56, and their 27-year-old son, Evan, were killed in the early hours of Monday morning at their house in Drumgowna, County Louth, Ireland.

A care worker who often visited the family made the grim discovery just before 10am.

Mark was found in a pool of blood at the gate, Evan was lying on the ground outside at the side of the property, and Louise was discovered inside the house.

Gardai later arrested a 31-year-old man, who was known to the victims, about a kilometre away.