The body of an unidentified man was found lying on the road along Demarara Road in Arima on Monday night.
Police said one spent shell was found close to the body, which suggested that the man was fatally shot at the scene.
According to a police report, at about 11:15 pm, police officers on patrol discovered the body.
Police said the victim is of African descent, dark brown in complexion, about five feet six inches in height and wore a braided hairstyle.
The body was clad in a red and black shirt and a pair of three-quarter jeans.
Police are asking members of the public to assist them in identifying the body, which was removed to the Forensic Science Centre in St James pending an autopsy.