The scene is currently closed for a technical examination.
Gardaí are appealing for witnesses to a fire at a premises in Longford town in the early hours of yesterday morning.
Residents in overhead apartments were evacuated due to the blaze on Grafton Court at around 1.30pm.
Nobody was injured, and the scene remains preserved for a forensic and technical exam.
Gardaí are asking anyone who was in the area between midnight and 2am to contact them.