A man in his 20s has suffered head injuries after being beaten with baseball bats.
A number of masked men launched the violent assault at Markstown Grove in Cullybackey, Co Antrim, at about 11pm on Thursday.
The victim also suffered injuries to his body and both hands.
He is currently being treated in hospital.
Chief Inspector Stephen McCauley has appealed for anyone with information to contact the Police Service of Northern Ireland.