A man was critically injured during an altercation around 4 p.m. on the street in the 0-100 block of West 79th Street, Chicago police said.
A 32-year-old man was injured on his hand by a 23-year-old woman with a sharp object, police said.
The man was taken to University of Chicago Hospital in critical condition.
The woman was taken into custody police said. Police continue to investigate.
CTA officials announced the station bypass on social media. Red Line trains have since resumed normal operations.
No further information was immediately available.
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