Police have referred two teenagers to Youth Aid after a school administration block was gutted by a blaze just before 4am yesterday.
Avondale detectives found and interviewed two 14-year-old youths in relation to the arson at Pt Chevalier School.
Police said both boys had admitted starting the fire and the matter would be referred to the Youth Aid section.
A sprinkler system was due to be activated at 9am yesterday - which would have prevented much of the damage, said Auckland fire service assistant area commander Roger Callister. That was one of many "disturbing" aspects about the blaze, he said, added to the fact several other minor fires had been lit at the school last week.
Board of trustees chairman Richard Green said the fire had started around recycle bins underneath the administration block. "It's done significant damage. This is the block that contains all our records and it's where the school is run from."