Seattle's mayor says a suspect arrested after a shooting that killed three people and left at least four others injured at a food festival near Seattle's Space Needle is 15 years old. Police are searching for a second person believed to have exchanged gunfire with the suspect already in custody. The victims killed were identified as a 19-year-old man, a 44-year-old man and a 56-year-old woman.
The names of the deceased weren’t released.
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