NSW man in coma after assault

A man is in an induced coma with head injuries after an assault on the NSW Central Coast.

Police were called to a house at Kincumber at 6.15pm on Thursday, with two men reportedly involved in an argument.

Police said the men were sitting outside the Kooronya Road property at the time.

A 47-year-old man was allegedly punched and fell to the ground, striking his head on the concrete.

He suffered head injuries and was airlifted to Royal North Shore Hospital, where he was placed in a induced coma.

Police later said officers arrested a 26-year-old man at a nearby house who was assisting with inquiries.