A man has died at the scene after driving his vehicle into the Timaru Police Station "at speed" last night.
Aoraki Area Commander Vicki Walker said police became concerned for the man's welfare after he was first seen driving erratically outside the station on North Street around 10.45pm on Monday.
"A police unit has signalled for the vehicle to stop, however, the driver has failed to do so and has driven off at speed."
Police pursued the vehicle for a short time and the driver then returned to the station, where he was spoken to by officers before driving away again.
"By this stage police held concerns for the man's welfare," Walker said.
About 11.30pm the vehicle was found on Barnard Street and its tyres spiked in an attempt to stop it.
"The vehicle then drove back towards the Timaru police station, and struck the building at speed.
"The driver died at the scene."
The Serious Crash Unit has examined the scene and inquiries into the incident were continuing.
Officers would be helping to support the man's family today, while support would also be provided for Timaru staff.
The man's death will be referred to the coroner, and the Independent Police Conduct Authority has been notified.
The station will remain open today.