One person was left in a serious condition after a vehicle flew over a fence and smashed into a power pole in South Dunedin.

Police suspect that the 31-year-old driver had suffered a medical event during the crash, Senior Sergeant Iain Notman, of Dunedin, said.

The man was in the car with his partner in McBride St, South Dunedin, at 5.15pm on Thursday.

He was approaching the traffic at the intersection when the vehicle “heavily and aggressively” accelerated onto the footpath.

Emergency services at the scene on Thursday evening. Photo: Linda Robertson

The vehicle began gaining height and flew over a short fence before smashing into a metal lamp post, bringing it down.

Both occupants of the car were taken to Dunedin Hospital.

Hato Hone St John said ambulance staff treated two patients and transported them to Dunedin  Hospital.

"One patient was in a moderate condition and the other in a serious condition.”

No other vehicles or people were injured in the event.

Snr Sgt Notman said the investigation was continuing into determining the cause of the crash.

On Thursday morning, one person was taken to hospital after a two-vehicle crash on an icy Kaikorai Valley Rd.