At about 1 am on Sunday April 9 a 25 year old man was walking on Broom Road near to its junction with Millburn Avenue when he was approached by another man who was unknown to him.
The man forced the victim to a nearby grassy area and subjected him to what is being described by police as a serious sexual assault.
The suspect then made off along Brooms Road in the general direction of Morrisons Supermarket.
The suspect is described as around 6ft1, of stocky build with a possible foreign accent, and was wearing dark clothing and a hooded top.
And yesterday a section of Brooms Road was sealed off for several hours while police carried out an investigation.
Detective Inspector Scott Young from Dumfries CID said: “A young man has been subjected to a terrifying sexual attack and extensive enquiries are underway to find whoever is responsible for this utterly despicable crime.
“I would like to speak to anyone who was in the area near to where Brooms Road meets Millburn Avenue between 12 midnight and 2 am on Sunday morning.”
DI Young added: “Whether you saw a man matching the description of the suspect, a man following another man, or a man in a state of distress — if you saw anything out of the ordinary at all then please come forward.”
Anyone with information is asked to contact officers at Dumfries CID via 101. Alternatively you can call CRIMESTOPPERS on 0800 555 111 where details can be given in confidence.