A man was arrested on suspicion of driving and drugs offences after a fail-to-stop road traffic collision near Wimborne.
The 34-year-old, from Bournemouth, has been released under investigation while enquiries continue.
Dorset Police received a report on Monday at 7.05am that a grey Skoda Octavia failed to stop after colliding with a bollard in Smugglers Lane in the Colehill area.
The man was arrested after officers located and seized the vehicle near the Canford Bottom roundabout.
Police have appealed for witnesses or anyone with relevant footage to contact them.
Police Constable Steve Hall, of Dorset Police, said: “We are investigating this incident and from our enquiries I understand there were two key witnesses in the area around the time of the collision who we are keen to speak to and take their account of what happened.
“I am also keen to hear from any motorists who were driving in the vicinity and may have captured relevant dashcam footage.
“Furthermore, I would ask any residents of the area to please check their home doorbell or CCTV cameras to see if they have captured anything of relevance to our investigation.”
Anyone with information is asked to contact Dorset Police at www.dorset.police.uk or by calling 101, quoting occurrence number 55240138921.