Logan Park High School has had another anonymous, threatening phone call, the third in the past two months.
The Dunedin school was one of 13 in the country to receive the same message yesterday.
Logan Park High School principal Jane Johnson said the call was an automated voice and the message was not a bomb threat.
On the advice of police, the school was not evacuated.
‘‘It wasn't a bomb threat this time. We're not actually revealing what the prank call was about, but it was a bit silly,'' Ms Johnson said.
Police had instructed her not to reveal the message, but police were looking at the possibility the call came from France, she said.
She had advised staff and parents of the threat.
‘‘We've informed the parents before the end of school so they could discuss it with their children.''
Pupils she had spoken to after the threats were ‘‘pretty calm''. The school was trying not to be ‘‘alarmist'' and was trying to strike a cautionary balance, she said.
‘‘We are confident that following the best advice from police in such situations remains the best response to such calls for everyone's safety and routines at Logan Park High School,'' Ms Johnson said.
Guidance counsellors were on hand for pupils in need and the incident would be discussed at an assembly on Monday, she said.
It is understood no other schools in Otago received a threat but that an Invercargill primary school and schools in Brisbane had.
Senior Sergeant Craig Dinnissen, of Dunedin, said Logan Park High School was one of 13 schools involved in a threat.
Police issued a statement saying the calls began about 11.20am yesterday and bore similarities to threats on 27 schools on February 25. The day before that, Logan Park High School and six others received bomb threats.
The Dunedin school received its first, separate threat on January 29.
‘‘These [threats] involve the use of a synthesised voice, with calls occurring at a similar time and day of the week,'' police said.
‘‘Police have attended each school and worked with their management teams to decide on the appropriate response.
‘‘Police are undertaking a number of lines of inquiries to establish the exact origin of these calls, and are continuing to work with the Ministry of Education and individual schools to gather information and ensure the safety of staff and students.''
