A couple and their young daughter escaped uninjured when their home in Co Down was extensively damaged in an arson attack this morning.
Police said a shed at a house in Clarehill Lane, Holywood was deliberately set alight shortly before 6.30am.
The blaze quickly spread to a nearby oil tank and to the family home.
A 33 year old man has been arrested by detectives.
Detective Constable Kacey Dickson said: “Thankfully the occupants, a couple aged 28 and 26, and their four-year-old daughter, were able to make their way outside unharmed however their home was extensively damaged.
“The suspect was arrested early this afternoon at an address in Oakley Avenue. He remains in custody at present.
“We are appealing for witnesses or anyone with information about this crime to get in touch with us by calling Reactive and Organised Crime detectives on 101.”