A man in his early 20s was found dead in a bush on the night of September 27 near Kuengarabten.
The deceased who is from Samcholing is said to have suffered a head injury and cut on the neck.
According to the sources, the body of the deceased was thrown in the bush nearby and the suspect, his roommate fled the scene. Alcohol bottles and a container to consume marijuana and also a broken peach wine bottle were found in their room.
Both were security guards with one of the companies working at Mangdechhu hydropower plant.
The suspect in his early twenties from Samdrupjongkhar was apprehended from Hongtsho security checkpoint in Thimphu the next day on the Trongsa-Thimphu bus.
Police collected fingerprints from the crime scene and investigation is underway.