A woman escaped uninjured after an arson attack on her Hampshire home while she slept.
The 50-year-old, of Thames Close, Farnborough, was woken on Friday at about 2300 BST by a noise at her door.
When the she went to investigate, the woman found her front door and curtains engulfed in flames.
The woman managed to escape and contact a neighbour for help. A 25-year-old man from Yateley has been arrested and released on bail.
Hampshire Police said they believed something was put through the letterbox which caused a magazine on the floor to ignite.
The fire spread to the curtains surrounding the door and began to ignite boxes in the hallway.
Det Con Andy Sullivan of Hampshire Constabulary said: "The fire spread quite quickly and could have engulfed the first floor of the property in minutes had the occupant not taken immediate action."
Investigators said they want to trace a man seen at the scene who is described as white, aged 18 to 19 years old, 5ft 6in to 5ft 7in, of slim build, with short dark hair and wearing a dark T-shirt.
They are also trying to locate the driver of a small silver or grey car seen entering the cul-de-sac at speed at about 2300 BST.