A man who was shot in the legs in a suspected attempted murder in Sussex had been the victim of an arson attack a month before, police have said.
The 29-year-old was treated for minor injuries after two shots were fired through the closed front door of his home in Park Way, Crawley.
Police said CCTV captured the gunman walking up to the front door wielding a shotgun at 2255 BST on Tuesday.
Detectives are investigating links with the arson attack on 5 July.
In that incident, the victim's window was smashed and accelerant poured into the property, causing damage to the living room.
Police said it was "possible" the two incidents are linked but it was too early to confirm at this stage.
A force spokesman said the victim did not know the gunman, but they believe it was a targeted attack.
She said: "The victim had heard a tap on the door and gone to answer it.
"When he opened the door he said he saw a man, he did not recognise, pointing a shotgun at him. He acted instinctively and quickly slammed the door shut.
"His quick reaction certainly helped save his life as the man fired two shots into the lower part of the door."
The victim was treated in hospital for pellet wounds to his knee. His wife was also at home at the time of the incident.
A police sniffer dog tracked a scent to Burns Road, where police believe the gunman got into a parked car and drove away.
Following the arson attack, police installed CCTV cameras at the man's house.
The cameras captured the gunman, who is described as a heavy built Afro Caribbean man in his 30s.