"The paramedics pronounced the infant deceased at the scene."
The infant's name has not yet been released, as police continue to advise all next-of-kin.
Victim support has been made available to the family in the wake of the tragedy.
Emergency services have extended their condolences to the baby girl's family.
"This is such a very sad and tragic situation," police said.
"It is a horrible thing to happen for that family."
Police will investigate the tragedy on behalf of the coroner.
This is the second backyard swimming pool tragedy to involve a young child in Gisborne this year.
A 16-month-old boy was found by family members in a pool at a property in Collins Street in early February.
St John officers carried out resuscitation on that occasion as well but the child could not be revived.
That incident was also referred to the coroner.
- Gisborne Herald
