A 79-year-old cyclist died after being found with serious injuries at the side of the road near Southerness.
The local man, who has yet been named by police, was discovered beside the A710 Dumfries to Dalbeattie road at around 8.15pm on Tuesday.
He was taken to Dumfries and Galloway Royal Infirmary where he later died.
Police are appealing for information and are keen to speak to the driver of a dark BMW that was seen in the area around the time of the incident.
Sergeant Bob McNay said: “Our thoughts go out to the family and friends affected by this incident.
“Enquiries continue and we are appealing to anyone who can assist us in establishing the full circumstances surrounding this.
“We are open-minded in relation to the circumstances regarding this incident.
“We are keen to speak to the driver of a dark BMW that was seen in the area shortly before the cyclist was found.
“I would ask that if you noticed a cyclist on this road or have any information that could help with our enquiries that you get in touch with police.
“If there are any motorists with possible dashcam footage of the area I would ask that you come forward and speak to officers.
The procurator fiscal has been informed of the man’s death.
