Three people are in custody after a young man's body was found on a remote road outside Alice Springs.
Northern Territory Police arrested two men, aged 20 and 21, and a male youth, a spokesman said on Tuesday.
A driver stumbled across the body of a 19-year-old man of African descent east of the desert city on January 1.
His death was treated as suspicious, with detectives previously calling on the public for information about a white Ford Ranger ute.