CHICAGO (WLS) -- A 31-year-old woman was shot and killed Monday morning in Chicago's South Loop, Chicago police said.

The woman was outside in the 2200-block of South State Street just after 9:05 a.m., police said.

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She was involved in a physical altercation with a known female suspect, when the suspect pulled out a gun and shot her in the face, police said.

The woman was taken to Stroger Hospital, where she died, police said.

The suspect was taken into custody, and Area Three detectives are investigating.

It was not immediately clear what led up to the fight between the two.

This is a developing story; check back with ABC7 Chicago for updates.

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