A baby is in a serious condition after being bitten by a dog in Hamilton on Sunday night.
The infant suffering from critical injuries is fighting for life at Waikato Hospital.
The baby is understood to be one-day-old, Stuff reported.
The dog is now secured at the council's animal control facility, Hamilton City Council animal control manager Susan Stanford said in a statement.
"This is a traumatic time for all involved and our thoughts are with the families and individuals involved," Standford said.
"Further decisions regarding the animal will be informed by the ongoing police investigation."
Emergency services were called to an address in the eastern suburb of Enderley around 7pm, police say.
Enquiries into the circumstances of the incident are underway.
Almost 5000 New Zealanders were hospitalised due to dog bites between 2004 and 2014 - an average of over one a day - Ministry of Health figures show.
The study published in the New Zealand Medical Journal found dog bites increased from 9 cases per 100,000 in 2004 people to 12 per 100,000 in 2014.