PICTURE: DREW GEDDES
Emergency services attended at the Old Glen area near Terregles after the discovery of an unconscious man around midday.
Police, fire crews and ambulances were called out and a 100-metres exclusion zone placed around a farm cottage.
A spokesman for Police Scotland said later: “Emergency services attended and discovered the body of a man within. His death is currently being treated as unexplained.
“In addition, they came across a chemical spillage on the floor of the cottage.
“Enquiries are underway to establish the nature of the substance.”
A number of roads were closed for a period between Terregles Village and the Old Glen Road to allow emergency vehicles access to the location and the public were advised to avoid the area.
Eye-witnesses close-by described noticing several people wrapped in foil safety blankets during the early stages of the response.
Scottish Fire and Rescue Service (SFRS) crews attended from near-by Dumfries.
An SFRS spokesman said a number of their units were called out at 1.18 pm to assist other emergency services.
They still remained at the scene at 4.45 pm.