Seaside Police are investigating a fatal shooting on Sunday that they believe was gang-related. The 18-year-old male victim was injured in a gun battle between two cars that occurred in the early hours of Sunday morning on the 600 block of Hamilton Avenue. Community Hospital reported to Seaside Police that a gunshot wound victim had been brought to their emergency room. The man later succumbed to his injuries. Shortly after the first shooting incident, additional gunshots were hear on the 1200 block of Hilby Avenue. No additional victims have been identified.