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The Alameda County coroner's bureau has determined that a man found dead in the center median of a street in Berkeley last week appears to have been struck by a vehicle, so Berkeley police said Wednesday they are treating the case as a fatal hit-and-run collision. 

The man's name is not being released yet by the coroner's bureau because his next of kin have not been reached. He was found by officers who responded at about 12:35 a.m. Sept. 6 to the area of Ashby Avenue and Adeline Street on a report of a man lying motionless in a center median, police said. 

Emergency responders pronounced the man dead at the scene and there were no immediate signs on the road of a collision or obvious trauma to his body, so the death was believed to be from a medical issue, according to police. 

However, the coroner's bureau autopsy showed blunt force trauma, and Berkeley police are considering the case the city's fifth traffic fatality of the year. 

Investigators believe the collision may have occurred sometime on the evening of Sept. 5, and are asking anyone with information to call the department's traffic unit at (510) 981-5980.