A major road in Dumfries has been closed after a man was found seriously injured between the New Cargen Bridge Roundabout and the Cuckoo Bridge Roundabout.
Police said it was unclear how the man had become hurt after he was discovered at around 3.30am and was taken to Dumfries and Galloway Royal Infirmary.
The A75, which runs between the two roundabouts, was closed in both directions in the early morning.
Officers appealed for anyone travelling on the A75 or the Hardthorn Road, which passes over the top of the A75, who may have seen something to get in touch.
The road remained closed more than six hours later as police continue their investigation.
Detective inspector Hayley Little said: “It is unclear how this man came to be on the A75 and enquiries are ongoing to establish the events leading up to him being injured.
“We are appealing to anyone who was on the A75 or the Hardthorn Road, which passes over the top of the A75, around this time and who may have seen something. We are also keen to obtain any dash-cam footage from the A75 or the Hardthorn Road around the time of the incident.
“Anyone with any information should contact officers through 101, quoting incident number 0596 of November 12, 2022.”