The south Auckland student who assaulted a teacher last week will remain suspended while the police and his school investigate.
Police became involved after a student at Southern Cross School punched a teacher when he stepped in to resolve an incident during a lunchbreak.
Principal Robin Stokes said any decision on the student's future at the school would depend on the outcome of the police and school board of trustees investigations.
Two board meetings have so far been held and the student has been given the opportunity to present his case. He remains suspended.
Counties Manukau police spokeswoman Natalie Swart confirmed police had begun an investigation.
Swart said while the teacher would not suffer any ongoing health issues, the assault was serious enough to warrant police involvement. She said police would be speaking to the offender ''in due course''.
Stokes said the teacher had not yet returned to school and he was not sure when he would.
Another Southern Cross pupil was suspended after he assaulted a student during a rugby league match with Howick College last Wednesday.
Staples said the school took a ''very hard line'' on violence and was treating both incidents seriously.
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