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(WBIR) Firefighters are investigating an apartment fire near downtown Knoxville that sparked early Saturday morning.

Crews responded to the Summit Tower Apartments off Locust Street at about 4:20 a.m., and said they saw flames coming from the sixth floor. KFD said the sprinkler system extinguished most of the fire.

No one was inside the apartment at the time of the incident. A few apartments below suffered minor water damage.

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