Police said the teens gathered near Red Line stop at 800 North State Street, where they were reportedly fighting amongst themselves, trespassing, and refusing to listen to officers.
WATCH: More than a dozen teens arrested in downtown Chicago
More teens arrested for disorderly conduct downtown
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Police increased patrols this weekend downtown after a similar situation Wednesday night when hundreds of teens flooded into Millennium Park.
RELATED: Police: Hundreds of teens flood downtown Chicago; 31 charged in disturbances
Thirty-one people were arrested in the first incident and are facing charges that include disorderly mob action, resisting arrest and battery.
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No one was seriously injured in the disturbance, but the Chicago Police Department issued a warning ahead of summer that this behavior won't be tolerated.