In a statement, the IPCA said there was a need to review the events leading up to the attack and Samsudeen's death and the extent to which the risk assessment and mitigation strategies in place to respond to the perceived threat he posed were appropriate and adequate.
It said there should be a co-ordinated review because each agency involved in the matter "has its own oversight mechanism empowered to review its decisions and actions".
"It is highly likely that at least some of the decisions and actions taken in this matter involved inter-agency cooperation, with no individual agency being solely responsible for them," it said.
"It is therefore appropriate that the oversight bodies should coordinate their efforts to ensure that the inter-agency or 'collective' decisions and actions are properly examined as a whole, rather than being considered in a fragmented way because the individual agency was only a part of the whole picture."
The review will examine whether the decisions and actions taken by police, Corrections and the NZSIS to assess and mitigate the threat posed by Samsudeen were appropriate and adequate.
It will also examine the collective decisions and actions of the relevant agencies.