Police are encouraging drivers to be cautious as winter sets in.

On May 31, police attended a vehicle accident on State Highway 8 near Beaumont.

The car hit a cow and although the driver was unharmed, the car was written off.

Police did not provide any information regarding the condition of the cow.

On June 1, police attended a serious crash on the Clinton Highway involving a collision between a car and a milk tanker.

Police confirmed the driver sustained serious injuries and was in a critical condition in Christchurch Hospital.

On the weekend of June 3 and 4, police investigated a sudden death in the Blue Mountains in West Otago, which they referred to as an incident involving firearms and a hunting accident.

The death of a female hunter was referred to the coroner and no further information has been released.