Ms Sandilands said the father was allegedly drunk and as he had been driving was given a test, which showed he had a level of 876 micrograms of alcohol per litre of breath. He was charged with driving with excess breath alcohol and the case was also referred to CYF and charges may be laid against the parents of both children.
Ms Sandilands said the law was in place for good reason as it was potentially dangerous to leave young children home alone without proper supervision.
"If you have to go out make sure you arrange adequate care and supervision for your children if they are under 14, you can't just leave them by themselves," she said.
"Kids aged five and six are way too young to be left alone."
Ms Sandilands said police will always refer such cases to CYF.
In New Zealand, it is against the law to leave children under 14 without making reasonable provision for their care and supervision. What is considered 'reasonable' takes into account the circumstances in which children are left alone and the length of time they are alone.