This is a developing story and updates come in quickly. Be sure to check back. Latest updates will always be at the top of this thread…

UPDATE: Street outside building turned into makeshift ER.

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UPDATE: 12 Dead

Police chatter over scanners says as many as twenty people may have been injured. No details other than that it is in a building in the 1300 block of S. Waterman.

SWAT On scene: