Police have launched a homicide investigation into the death of a 19-month-old toddler.

The toddler was brought into Gisborne Hospital with critical injuries on Thursday, January 6, and was subsequently flown to Starship Hospital.

"Sadly, the toddler died today," says a police spokesperson.

"Police enquiries into the nature and circumstances surrounding their injuries are continuing."

A scene examination has been completed at a residential address in Te Hapara, Gisborne.

"Police are speaking to a number of people, but we would like to speak to anyone else who may have information that could assist our enquiries in determining how the toddler's injuries were sustained."

If you can help, please contact Police via 105 and quote file number 220106/5689.

Information can also be provided anonymously through Crime Stoppers on 0800 555 111.