Homicide investigation launched after three-month-old baby dies in Christchurch Hospital

Police have launched a homicide investigation following the death of a three-month-old baby in Christchurch.

The child was admitted to Christchurch Hospital on December 31 with serious injuries and died on Sunday. 

"Police staff have spoken to a number of witnesses in relation to the death and they have provided critical information which is assisting the ongoing investigation," Canterbury Police said in a statement.

"While some information has been provided we are still appealing for anyone who may have details about how the baby was injured to come forward and speak to us."

Police have not released the name of the baby.

An investigation was launched on Saturday after the baby was admitted to hospital before a scene examination of a property in Cuffs Rd in the Christchurch suburb of Wainoni was set up on Sunday as police investigated what occurred.

A neighbour told Stuff a couple and a baby about "a couple of months old" lived in the property. 

The family "keep to themselves" and were a "nice couple", they said.

Anyone with information is asked to call 105 and quote file number 211231/7575. Information can also be provided anonymously via Crime Stoppers on 0800 555 111.