CHICAGO — A suspected robber was shot Wednesday afternoon by an off-duty officer on the South Side amid a struggle, according to Chicago police.

The department said the shooting occurred just before 1 p.m. in the 1300 block of W. 90th Street. A female off-duty officer, who police said pulled her gun and announced she was a cop, interrupted an apparent robbery in front of an apartment building on the block.

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Police said when the offender tried to grab the off-duty officer’s weapon, a struggle ensued, resulting in the cop discharging their gun.

The offender was struck and taken to Advocate Christ Medical Center in serious condition.

The officer was evaluated for non-life-threatening injuries.

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The Civilian Office of Police Accountability is investigating the shooting and the officer will be placed on administrative duties for 30 days as is standard.