A group of Waikato students damaged police property after officers tried to arrest a fellow student.
Two officers went to Te Awamutu College to arrest a 14-year-old when a group of others got involved and began obstructing them.
Waikato police senior sergeant Stephen Ambler said there were no injuries to officers or students.
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Ambler said police were called about 11am to remove a student who had damaged a wall of the school building.