A national Muslim spokesperson says threats that forced two Auckland Islamic schools to close today are shocking - but not surprising.

Māngere's Al-Madinah School and Zayed College for Girls closed, and access is limited to New Lynn's Iqra primary school.

Police are investigating a threatening email.

Federation of Islamic Associations spokesperson, Abdur Razzaq says Government moves to relax national security put more than schools at risk.

"It's not just us - with the globe looking how it is now, it could happen to any of us, or another school, it could happen to a synagogue, a community centre, a women's centre...there are important lessons from this."

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• Two Auckland Islamic schools in lockdown after suspicious threat, closed today
• Government cost-cutting leaving New Zealand open to terrorism, Muslim group says