Police have been granted extra time to question a man in connection with a fatal house fire in Derrylin, Co Fermanagh.
Four people - including a young child - died in the blaze in a remote area on Molly Road in the early hours of Tuesday.
Police believe it was started deliberately.
A 27-year-old man was arrested on suspicion of murder. Detectives have now been granted an addition 36 hours by a court for questioning.