A father and son were knocked out in an unprovoked attack outside the Recreation Hotel in Greymouth on Saturday night.
The pair were leaving after a sports function when the younger man was suddenly attacked. The father came to his aid but was felled by a punch and knocked out when his head struck the concrete.
Police confirmed that both men were punched in the head and knocked out in the 12.30am assault. They were taken to Greymouth Hospital by ambulance where they were treated for moderate to serious face and head injuries, Senior Sergeant Allyson Ealam said.
The older man suffered a broken jaw.
A man in his 20s has been charged with the double assault.