Gardaí officers are investigating an arson attack in Waterford that claimed four lives. Three people have been arrested in connection with the fire. Those detained are described as one man and two women. The material available gives no names, ages or other identifying details for the three people taken into custody. It also does not specify the individual charges they face or their exact role in the blaze. Questions remain about how the fire started and what circumstances led to the deaths. Further details about the victims and the inquiry have yet to appear in the item.