Gardaí have arrested a further man in his 20s as part of the ongoing murder investigation into the fatal arson attack in Birchwood, Waterford City, which claimed the lives of four members of the same family.

The latest arrest took place this afternoon, Thursday, October 22nd, with assistance from the National Bureau of Criminal Investigation.

The man was arrested under Section 72 of the Criminal Justice Act 2006 and is currently being detained at a Garda station in the south east.

Three other people have also been arrested in connection with the investigation, while two people have already been charged and appeared before the courts.

Gardaí say two people arrested on October 20th have had their detention periods extended, while four people are now in custody under Section 50 of the Criminal Justice Act 2007.

Further searches are expected as part of the investigation.

The arson attack occurred shortly after 5am on Tuesday, October 13th, claiming the lives of Philip and Kim English and their two sons, Callum and Jayden.

Gardaí are continuing to appeal for information and are asking anyone who can assist the investigation to contact Waterford Garda Station on 051 305300 or the Garda Confidential Line on 1800 666 111.