They were not immediately able to comment, a police spokeswoman said.
The incident came around four hours after four people were injured in a Dunedin house fire.
Hato Hone St John sent an ambulance and a rapid response unit, treating two in a minor condition at the scene and taking two more – one in a minor condition and another in a moderate condition – to Dunedin Hospital, a spokeswoman said.
The fire at the house on Allandale Rd in the suburb of St Clair was “significant”, with more than two dozen firefighters battling it at its peak, a Fire and Emergency spokesperson said this morning.
“A number of people were evacuated from the building.”
A fire investigator was expected at the scene this morning.
In Auckland, a person was taken to Auckland City Hospital in a moderate condition after a fire at a Potters Ave property in Mt Roskill just before 9pm, a Hato Hone St John spokeswoman said.
And in Hastings, a person “in a minor condition” was treated at the scene after a fire in a house in Mahora just before 2am, the spokeswoman said.
A fire investigator was expected to reach the scene this morning, a Fire and Emergency spokeperson said.
Firefighters were also called to a blaze at a property in Levin overnight, with the 4am fire being investigated by both police and Fire and Emergency, the spokesperson said.