The investigation remained ongoing and was still in its early phases, she said.
In a Facebook post detailing yesterday's accident, school board member Mark Eades said the injured pupil had been taken to hospital and "our thoughts are with the family".
The school remained open yesterday, with the focus on supporting pupils and staff.
"We will endeavour to keep our community updated whilst respecting the wishes and privacy of the family involved.
"Thank you to everyone for your ongoing support," said Eades.
The Ministry of Education's specialist team had been asked to provide support to the students, staff and community.