One more person has been arrested in connection with an arson attack that resulted in the murder of four people in Waterford city last week.
Gardaí in Waterford, assisted by members of the National Bureau of Criminal Investigation, arrested the man in his 20s this afternoon.
The man was arrested under Section 72 of the Criminal Justice Act and he is currently detained at a garda station in the south east.
Gardaí have said that they anticipate that further searches will be carried out as part of the investigation.
Gardaí have said that two of the three people who were arrested on Tuesday in connection with their investigation have had their periods of detention extended.
However, all three of these people – a man in his 50s and two women in their 30s – remain in custody this evening.
A total of four people are now detained under Section 50 of the Criminal Justice Act, anti-gang legislation.
They have been arrested on suspicion of facilitating the activities of an organised crime group.
Kim and Philip English, and their two sons, 12-year-old Callum and nine-year-old Jayden, died following an arson attack on their home in the Birchwood estate on 13 October.
Two more children were critically injured in the attack.
A total of six people have now been arrested as part of the investigation into the arson attack.
The two other people, Jessica Dalton, aged 31, with an address in Waterford city, and 21-year-old Cian Stacey, and of no fixed abode, appeared before Waterford District Court on Tuesday.

Jessica Dalton and Cian Stacey appeared before Waterford District Court on Tuesday
They were further remanded in custody and will be back before the same court again on 17 November via video link.
Gardaí continue to appeal to anyone with information about the arson attack to contact them.
Their investigation team can be contacted at the incident room set up at Waterford Garda Station on 051 305 300, the Garda Confidential Line at 1800 666 111, or any garda station.