A woman and a teenage boy have been seriously injured in an arson attack on a property in Finglas in Dublin in the early hours of this morning.
Another woman and two teenage girls were also taken to hospital with what are described as non-life threatening injuries.
The fire broke out at a house at Creston Avenue at around 12.45am.
One line of inquiry being pursued is that the perpetrators may have targeted the wrong home in a case of mistaken identity.
There were five people in the house at the time, the two women, who are aged in their 40s and 20s, and the three teenagers.
The older woman and the boy were seriously injured.
All five are being treated at Connolly Hospital Blanchardstown and Children's Health Ireland at Temple Street.
The fire was brought under control by Dublin Fire Brigade crews and the scene has been preserved for a technical examination.
Gardaí are appealing to anyone who noticed anything suspicious in the Creston area between midnight and 1am, or anyone with video footage (including dash-cam), to contact Finglas Garda Station on 01 666 7500, the Garda confidential Line on 1800 666 111 or any garda station.
