Interesting that the assistance comes from other FVEY nations, I wonder if they have any jurisdiction, or just "here to help" - FBI, AFP. Who do they truly represent?

https: //www.tvnz.co.nz/one-news/new-zealand/christchurch-terror-attack-police-welcome-people-surrender-their-firearms-nzs-largest-investigation-underway?variant=tb_v_1