Western Australia Police are investigating the circumstances surrounding the death of a man whose body was discovered on the side of the Goldfields Highway in Kalgoorlie-Boulder.

Emergency services were called to an area near Roberts Street on Friday morning following reports that a person had been located unresponsive beside the roadway. Upon arrival, officers confirmed the man had died at the scene.

Police immediately established a crime scene and closed off sections of the surrounding area while specialist investigators examined the location. Detectives from the Kalgoorlie Detectives Office have commenced inquiries to determine how the man died and whether any criminal activity was involved.

At this stage, authorities have not publicly released the identity or age of the deceased, pending formal identification procedures and notification of next of kin.

Forensic officers were observed conducting detailed examinations of the scene throughout the day, collecting evidence and documenting the area as part of the ongoing investigation.

Investigators are working to establish the man's movements in the hours leading up to his death and are appealing for assistance from members of the public who may have been travelling along the Goldfields Highway near Roberts Street during the relevant period.

Police are particularly interested in obtaining dashcam footage from motorists who drove through the area overnight or during the early morning hours before the discovery was made.

The Goldfields Highway is a major transport route servicing both local traffic and the region's mining industry, connecting communities throughout Western Australia's Goldfields. The discovery prompted concern among local residents and commuters, although authorities stressed that inquiries remain in the early stages.

WA Police have not yet indicated whether the death is being treated as suspicious. Officers stated that all possible circumstances surrounding the incident are currently being considered as investigators await further forensic results.

Anyone with information that may assist detectives has been urged to contact Crime Stoppers on 1800 333 000 or submit information online through the Crime Stoppers Western Australia website. Reports can be made anonymously.

A post-mortem examination is expected to be conducted to determine the exact cause of death.

The incident highlights the important role members of the public can play in assisting police investigations, particularly through the provision of CCTV or dashcam footage that may help establish a timeline of events.

As the investigation continues, police have asked the community to avoid speculation and allow detectives the opportunity to gather all available evidence before drawing conclusions about the circumstances surrounding the man's death.

Further updates are expected to be released once formal identification processes have been completed and investigators have obtained additional information regarding the events leading up to the discovery.

WA Police continue to urge anyone who may have seen unusual activity in the vicinity of Goldfields Highway and Roberts Street, Kalgoorlie-Boulder, to come forward.

The investigation remains ongoing.