A 19-year-old man was shot in the leg by masked men in Bushmills on Wednesday night.
It happened at Woodvale Park just after 11:10pm.
Detective Sergeant Gardiner said a number of masked men entered the house armed with a gun and wooden weapons.
The teenager was shot in the leg inside the house, before being dragged into the front garden and shot again in the same leg.
He was then beaten with the wooden weapons before the masked men left the property on foot.
The man was taken to hospital for treatment to his injuries, which included gunshot wounds and a head injury.
The gun was also pointed at a 19-year-old woman who was inside the property at the time. She was thankfully physically uninjured but has been left shaken by the incident.
Detective Sergeant Gardiner added: “Enquiries are continuing and I would urge anyone with any information to call detectives on 101 quoting reference number 2109 11/05/22.”
Information can also be given anonymously through the independent charity Crimestoppers on 0800 555 111. A report can also be made online using the non-emergency reporting form via www.psni.police.uk/makeareport/.