Gray said the man received immediate first-aid by police and was then airlifted to Middlemore Hospital in a serious condition.
“Three other people were located within the address and have been detained in relation to this warrant.”
A fifth person fled from the area into nearby bush and the Police Air Support Unit (Eagle) responded.
Gray said despite efforts by the Eagle helicopter and Police Dog Unit, he had not been found.
“Police will remain in the area while our inquiries continue to locate them.”
He said, at this stage, police believed the man did not pose a wider risk to the public.
“There are now several investigations under way, including a critical incident investigation and a policy, practice, and procedure investigation.”
St John said they were called to an incident in Āwhitu just after 7am.
They sent one road manager, one rapid response vehicle, one road ambulance and a helicopter.