Andrew Little is assuring the Muslim community in New Zealand they are safe, despite the fact threats are being made online.
Fifty people were killed in terror attacks at two Christchurch mosques on Friday.
Little told Mike Hosking expressions of hatred are being made and agencies and police have to assess whether they'll lead to physical violence.
"There are people who have been online making statements. They have all been interviewed by the police."
Little says there's a level of intervention and a heightened level of monitoring.
"I am confident an inquiry into the Christchurch terror attacks will show security agencies have been doing their job properly."
The inquiry will look at whether red flags were missed by the SIS, GCSB, Police, Customs and Immigration.
Little says it's important the review takes place because an independent and high-level pair of eyes will look over everything and provide a report.
"The inquiry will provide reassurance these agencies have done the correct thing, and done nothing other than fulfil their mandate."
However, he says spy agencies have had significant increases in their budgets in recent years and we need to be sure they have geared up to prevent these sorts of things happening.