Ms Philips said she couldn't comment on the assault as the couple did not make a formal complaint.
In general, close to half of all offenders that Whangarei police deal with were school aged.
She said the busiest time for police was between 3pm-7pm each day, when the youths were out of school.
"A lot of offences come in after school. Early Saturday morning and Sunday morning is when we got a lot of disorders, when people are leaving bars and clubs."
She said deciding which areas and types of crimes are priority was reviewed daily, weekly and monthly.
Jess White, owner of The Old Stone Butter Factory, said she wasn't aware of any assault on Saturday night, but youths had been hanging around and drinking at the Laurie Hall Carpark and making trouble for a while.
She said her priority was keeping her staff and patrons safe, and she had approached the youths herself on a number of occasions and told them to move on.
"It's like they are getting bolder and have less respect for authority, whether it's business owners or adults or the police," she said.
"A couple of women have told us they don't feel safe round here late at night, and come in the long way from Bank St."
Ms White has approached the council to install lights on the lane, and is hoping to reach an agreement with other building owners in the area to install security lights.
Meanwhile, to prevent alcohol-related crime, Ms Phillips said police were making their presence clear in clubs and bars.
"We get into the pubs and clubs earlier in the night and go door-to-door when people are leaving to make sure they have a safe ride home," she said.
"If early on in the night people see cops around it makes them think twice about having the last bottle of beer."