A female pedestrian has suffered serious head injuries after an incident on Castle Lane East.
The woman was taken to Poole Hospital for treatment. Her injuries are described as serious but not life-threatening.
Police received reports of a collision involving a grey Hyundai Amica and a pedestrian on Castle Lane East at the junction with the A338 Wessex Way.
The driver of the Hyundai was uninjured.
The incident happened shortly before 4pm on Wednesday afternoon and officers are asking for any witnesses to come forward. Castle Lane East was closed for a short time.
Police Sergeant Lee Savage, of the traffic unit, said: “An investigation is underway to establish the full circumstances of this collision.
“I am appealing to anyone who witnessed the incident, or captured anything relevant on dashcam, and has not yet spoken to officers to please contact Dorset Police.
“I would like to thank motorists for their patience and understanding while we responded to the incident. The road closures were absolutely necessary to enable emergency services to deal with the scene safely.”
Anyone with information is asked to contact Dorset Police via email at scit@dorset.pnn.police.uk or by calling 101, quoting incident number 2:570.
