Police say the victim of an accidental police shooting in Hastings was shot by a Bushmaster rifle which was slung over the shoulder of an arresting officer.
Iriheke Te Kanui Manu Pere, 33, is in a serious condition in intensive care after suffering a single gunshot wound to his upper back.
Mr Pere was shot after his family called police to a house on Karamu Road about 5pm on Friday saying they were concerned about his behaviour. He had allegedly pointed a firearm at his mother two days earlier.
Acting Assistant Commissioner Glenn Dunbier told a news conference on Saturday Mr Pere was fully compliant during his arrest and as officers moved forward to lift him to his feet a Bushmaster rifle slung over one of the officer's shoulders accidentally discharged.
Mr Dunbier says forensic tests are being carried out on the rifle to find out if there was any possible malfunction but at this stage human error is not being ruled out.
He says Mr Pere's family is shocked by the shooting and the officer involved is also extremely upset and has gone on leave.
A scene examination and witness interviews were being carried out on Saturday.
The Independent Police Complaints Authority and the police are investigating.
Police say it will be several weeks before the outcome of the investigations is known.