Students then marched to the Auckland Central Police Station to demand the release of their peers.
Earlier, students said some of their number had clothes ripped as they were dragged away by police, during the latest protest in Auckland over tertiary education cuts.
Protestor Genevieve Connell said students had planned a peaceful 'teach in' but police officers jostled them, pulled students off the road and twisted their arms.
She said she had seen one girl with her tights ripped and a number of people had been hurt.
"It's pretty shocking.''
Another student said her brother had been dragged across the road - head against the "concrete''.
"There's been nothing but peace from us and nothing but contempt from them,'' said a Ph.D student and tutor who did not want to be identified.
Senior lecturer in the Department of Sociology, Campbell Jones, said police had hit and dragged a number of students.
Mr Jones delivered a lecture at the protest, reading Plato to the students just before police broke up the crowd.
"What they're protesting today is a disgraceful political decision.
"The elite will have education and others won't,'' he said.
Another protestor said the forceful police action was unwarranted.
It had escalated the situation and strengthened the protester's resolve, he said. "This is not containment anymore.''
- HERALD ONLINE