A police investigation into the hoax bomb threats received by a number of schools across New Zealand has established they were phoned in from overseas.

Pupils at both Tahatai Coast and Otuemoetai Primary schools were evacuated as a precaution after receiving threatening calls on Thursday, shortly after 11am.

A police spokesperson says the safety of students, teachers and schools are their priority.

'We understand the fear and concern that these types of events will cause, however we reiterate that we have not established any actual threat to the schools who received calls.”

'In the last 24 hours, police have continued to liaise with our international partners as the call trail lead police to an overseas origin.

How a school responds to these calls is a matter for the schools management in conjunction with police. Schools will respond according to their individual circumstances and the information available to them, the spokesperson adds.

'Police will continue to work with the schools and the Ministry of Education, where appropriate, to respond to these events.”

These latest bomb threats follow similar ones made earlier in the year made to Brookfield Primary and St Thomas Moore Catholic School.

Hoax bomb threats were also made to a number of schools across Australia, reports The Age.

Pupils at Tahatai Coast School evacuated to Grenada Park after the school received the hoax bomb threat. File Photo.