Police are investigating the death of a five-month-old baby girl in Hamilton yesterday.
Police were called to an address in east Hamilton shortly before 5pm by ambulance staff who had been waved down outside the address.
The infant was taken to Waikato Hospital in a critical condition but died about 11am today.
Detective Senior Sergeant Mark Greene said that "while we first and foremost are supporting the family through a traumatic situation, we need to thoroughly investigate the circumstances surrounding what has occurred".
"The investigation is very much in its early stages. We are undertaking a scene examination and a number of interviews as we seek to understand what has happened," Mr Greene said.
