"Upon Police arrival, two people were located with critical injuries," Beard said.
"First aid was immediately provided, however both have sadly died at the scene. A third person found at the property has been taken to hospital with critical injuries.
Police have cordoned off the house on The Drive in the Auckland suburb of Epsom
"Police are making a number of initial enquiries to establish what exactly has taken place.
St John confirmed paramedics treated two people - one in a critical condition and another in a minor condition.
Both people have been taken to Auckland City Hospital.
Epsom MP David Seymour told the Herald people in the community will be shocked.
"This is shocking and tragic for our community...they won't expect this to happen in their community. There will be a lot of demand for answers but the right thing to do is respect the privacy of neighbours who've had this terrible event occur. There will be lots of time for inquest afterwards."
He said people affected by the tragedy would need immediate support.
