Five nine-year-old Rotorua boys have been caught taking drugs during school lunchtime.
The Owhata Primary School students were stood down after being caught "taking puffs" of a joint and have since been given drug education.
The incident is described by city principals as unusual because the children are so young and it happened at a primary school.
School officials told the Rotorua Daily Post the matter was dealt with and they doubted it marked the start of an alarming trend.
But the grandmother of one of the boys said she was concerned cannabis was being distributed in primary school playgrounds.