Police are assuring the public there's no immediate threat of a terror attack in New Zealand. 

They're bolstering their presence around Jewish sites after the targeted attack on a Hanukkah celebration in Sydney's Bondi yesterday. 

A father and son opened fired on a crowd of some 1,000 people - killing 15 and injuring more than 40. 

Assistant Police Commissioner Mike Pannett says in these situations, try and escape quickly and quietly, hide, and contact police when safe to do so.  

"We will absolutely attend as fast as we can, but as these circumstances have shown over the last day, there is no crime advance warning."  

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