Caution for bomb hoax boy

was also examined. Students were evacuated to the school hall and banned from using phones as hazardous chemicals experts examined the envelope, which was found to contain flour.

“They told us there was a note with flour and it said ‘enjoy the bomb’,” one student told reporters.

Another said: “Everyone was a bit nervous and jittery.”

Police district duty officer Senior-Sergeant Bill Lythgo said the hoax was “very concerning” as it had caused “massive disruption”, stressed students and parents and tied up emergency services.

“It’s obviously a serious criminal matter,” he said.

A police spokeswoman said the 13-year-old would be cautioned by police and dealt with under the Youth Justice Act, which could involve him making a formal apology.

Police were still hunting the youth who left the envelope.