It's the Government's first step in implementing recommendations of the Royal Commission of Inquiry.
The Government is introducing the Counter-Terrorism Legislation Bill.
A military official said he could not be sure of their nationalities, but he believed they were foreigners because they were white.
It found our national spy agency's systems were "broadly effective".
It's up to Prime Minister Jacinda Ardern to decide what individuals or groups should be classified as a terrorist or terrorist organisation.
Suhayra Aden will likely arrive in NZ after Australia renounced her citizenship.
She started spreading dangerous lies which could have led to his death.
Aden acquired dual nationality after moving to Australia when she was six.
"[The threat] was credible enough that we took action straight away."