Two family homes have been gutted in separate overnight fires in counties Down and Tyrone.
PSNI detectives in Mid Ulster are investigating a blaze in Cookstown in which a caravan and house were extensively damaged in an arson attack.
Three fire crews from Cookstown and Pomeroy attended the scene of the fire at Kildress Terrace, a remote area around seven miles outside Cookstown.
The blaze broke out in the caravan at around 10pm on Thursday and spread to a two-storey mid-terrace house.
The fire is believed to have been started deliberately and police are treating the incident as arson endangering life.
"We received a report shortly after 10pm that a caravan located in the Kildress Terrace area was on fire and that the blaze had spread to a house close by.
"Both the caravan and house were gutted as a result of the blaze.
"I want to appeal to anyone who was in the area, between 10pm and 10.05pm and saw what happened, or who has information which may assist our investigation, to call detectives in Mid Ulster on the non-emergency number 101, quoting reference 1400 of March 21."
Meanwhile, over 30 firefighters spent almost three hours battling a blaze in the Lurgan Road area of Banbridge on Thursday around 7.45pm.
The NI Fire and Rescue Service said the blaze started in a motorhome in the Weavers Meadow development and spread to a neighbouring two-storey detached house and garage.
The occupant of the house, a man in his 60s, was treated at the scene for minor burns but did not attend hospital.
The fire service said the incident is being treated as accidental and may have been the result of a gas leak.