Officers are appealing for witnesses to come forward after a woman died in a collision on the A35 Upton Bypass in Poole.
A silver Vauxhall Astra left the road and landed in a ditch.
Very sadly the driver of the Astra, a 28-year-old local woman, died at the scene. Her eight-year-old daughter sustained very serious injuries and was airlifted to Southampton General Hospital. Her condition is described as critical. Their family has been informed.
Both the eastbound and westbound carriageways have been closed between the Holes Bay and Baker’s Arms roundabouts.
“We are carrying out a full and thorough investigation into this collision and I am keen to hear from anyone who was travelling along this stretch of the dual carriageway at the relevant time and witnessed the collision or the Astra being driven immediately before.
“I would also urge any motorists with dashcams fitted in their vehicles to please check their systems to see if they have any footage that may be relevant to my investigation.
“We closed this road to allow emergency services to treat those involved and for collision investigators to establish what happened. I would like to thank everyone for their patience and understanding.”
Anyone with information is asked to contact Dorset Police at www.dorset.police.uk, via email at email@example.com or by calling 101, quoting incident number 3:418. Alternatively, contact Crimestoppers anonymously on 0800 555 111 or via www.crimestoppers-uk.org.