Phoenix firefighters are battling a three-story apartment complex fire at 22nd and Northern avenues.
More than 100 firefighters responded to the fire around 3 a.m. Saturday morning. The building was under construction.
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Twenty people from neighboring homes were evacuated. ADOT closed the Northern exit off I-17 at Northern because of the amount of smoke billowing over the freeway. Drivers are urged to avoid Northern Avenue from 19th Avenue to 23rd Avenue.