A 10-month-old is in hospital with head injuries after a domestic violence incident at his Hamilton home which also left his mother nursing injuries.
Detective Senior Sergeant Daryl Smith said the boy was taken to Waikato Hospital's emergency department by his grandmother last night after an incident at the house on Tuesday night.
Mr Smith said CIB and the child protection team were now investigating what happened and how the pair came to be injured.
The child's grandmother took the infant to hospital after having concerns for his health after the earlier incident in which he suffered head injuries.
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Police were yet to speak to the child's mother, he said.
The child was in a stable condition in hospital where he remained as a precaution.