The three-year-old boy who died after being admitted to Taupo Hospital with critical injuries can now be identified as Moko Sayviah Rangitoheriri.

Following his death on Monday, a 26-year-old woman and a 43-year-old man from Taupo have been arrested and charged with assault.

Moko Sayviah Rangitoheriri died from critical injuries. Photo: Supplied.

The pair will appear in Rotorua District Court today.

The investigation into how Moko died is ongoing.

A post mortem examination began yesterday in Auckland and will continue today, as will the forensic examination of a property on Marshall Avenue, Taupo.

Police say no further comment can be provided until more is known about the circumstances of Moko's death.

In the meantime, anyone who has any information they feel may be relevant to the police investigation is asked to contact Taupo Police on: 07 378 6060.

Alternatively, information can be passed on anonymously to Crimestoppers on: 0800 555 111.