Police responded to a suspicious activity report at the New Lynn Ambulance Station early this morning.
A Police spokesperson told the Herald at around 3.45am a group of four males had broken into an ambulance parked at the station.
The vehicle was only started but not moved.
Police arrived shortly afterwards and located the group at the scene, all of whom were intoxicated.
Police said a 30-year-old man was taken into custody at the time and was assisting with enquiries.