The New Zealand Police have advised that care should be taken when attending accidents involving hybrid/electric vehicles. An incident involving a Prius hybrid vehicle resulted in the vehicle stopping and resetting itself, causing the vehicle to repeatedly move unmanned. The danger is the battery was driving the car. No noise could be heard, so personnel and bystanders were unaware of the danger. Ensure that hybrid vehicles are switched off and decommissioned at accident scenes, prior to scene examination and rescuing/attending to injured persons.