Police are increasing its presence in Auckland's city centre after a "disappointing level" of assaults and disorders at night over the past two weekends.
Auckland city district commander Superintendent Karyn Malthus says there's been an increase in incidents since alert level restrictions were lifted on bars and nightclubs.
"We are observing that a large number of these incidents we are attending on these nights are fuelled by excessive alcohol consumption."
In one event on Fort St last weekend, one person was allegedly knocked unconscious and multiple fights broke out.
"Police officers called in to assist were met with verbal abuse and had alcohol bottles thrown at them while they were trying to provide assistance," Malthus said.
"One officer suffered minor cuts after a bottle shattered against a nearby police vehicle.
"Police were trying to disperse those fighting and clear an area so that person could receive medical assistance."
She said the behaviour has been "totally unacceptable" and the treatment towards police was "not okay".
Several arrests were made across the CBD in relation to assaults and other incidents during both weekends. Police said some victims in these cases suffered serious injuries.
"In some cases it is very fortunate that police were not dealing with fatalities here," Malthus said.
There will now be an increased police presence so those coming into the city at night over the coming weekends feel safe.
"Police have been working with our partners, including city bar owners, to look at how processes can be improved to move people out of venues efficiently come closing time," Malthus said. "Let's turn things around, Auckland."
Police have released its "easy guide to a safe night out". It includes having a plan to get home safely, sticking with your group and staying connected with friends, and leaving alcohol at home since there's a liquor ban across the city.
It also suggests punters go home and not hang around in the city after they've finished at the bar for the night.