Police investigating three deaths in Timaru are giving more details of the homicide inquiry.

Three people were found dead when officers arrived at a house in Queens Street, in Parkside, just after 10pm yesterday.

Another person was taken to Timaru Hospital.

Canterbury District Commander Superintendent John Price and Detective Inspector Scott Anderson are speaking to media.

Police remain at the property, and can confirm that the deceased were siblings, they say. Two are three-years-old, one is seven-years-old.

There was also a woman at the property who was transported to Timaru Hospital and is in a stable condition.

They say the investigation into the tragedy is still in its early stages, but no other people are being sought.

Those involved had arrived from South Africa in the last week.

At this stage police will not be releasing further details about the victims.