Police at the scene of the stabbing.
A second person has been arrested over a double stabbing in Grey Lynn.
A 34-year-old man has been charged in relation to assault with a weapon, police said today.
It follows the arrest of a 23-year-old man yesterday.
Two people suffered critical injuries after being stabbed outside a Grey Lynn bar in the early hours of Sunday morning.
Both victims remained in hospital yesterday.
Police earlier said that a "large" fight began at the Grey Lynn Tavern about 1am, and spilled out on to Great North Rd.
Acting Detective Inspector Glenn Baldwin said police had completed a thorough scene examination but were still examining CCTV footage in the area.
"We believe there were a number of people recording the incident on their mobile phones and we would like anyone who has footage to get in touch with us," he said on Monday.
Polkinghorne was sentenced to 150 hours of community work for drug possession.