“Two others were found to be in a critical condition and one in a serious condition, and were transported to Hastings Hospital.
“Sadly, both critical parties have now also died.”
James said a homicide investigation had been launched, and a scene examination was underway.
“Police appreciate this is a distressing incident that will no doubt be concerning to nearby residents.
“I would like to reassure the community that this was an isolated incident, contained to this specific group of people, and there is no risk to the wider public.”