The Pacific Christian School in Mangere had its registration suspended last week by the Education Ministry.
The school's principal, Lisita Paongo, says police warnings given to the school lacked evidence. Ms Paongo says families and staff are disappointed with the decision and want the school to stay open.
She says they're even more upset because they found out through the media before a formal announcement was made by the school's board.
The school came under scrutiny last year, when an 11 year old stabbed another child with a pair of scissors.