A speeding driver has serious injuries after crashing into another car on the Kapiti Expressway in front of a police officer.
Police witnessed the crash at the Kapiti Rd intersection about 11.30 last night.
An officer was parked on the side of the road and was not following the car at the time.
The injured driver was taken to Wellington Hospital.
Two passengers in the car were arrested on outstanding charges.
The driver of the other car was not injured.
The Serious Crash Unit is investigating and a police spokesperson says charges are likely to follow.