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Police are investigating a shooting in Dallas that killed four people, including a one-year-old boy. A 15-year-old girl was also shot and is hospitalized in stable condition. Officers responded around 4:30 p.m. to the reported shooting at a home on Royce Drive. They found five people who had been shot inside the home. Three adults were dead at the scene. The teenager and the one-year-old were taken to a local hospital, where the younger child later died. The victims' names haven't been released. No arrests have been made.