CHICAGO (CBS) — A 52-year-old man was attacked while walking in Lakeview on Monday morning, as a group of robbers stabbed him and sprayed him with a chemical before taking his property.

Police said the victim was walking near Belmont and Sheffield avenues around 7:50 a.m., when a group of two or three men approached him, less than a block from the CTA Red Line station at Belmont.

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The robbers sprayed him with a “chemical irritant,” and stabbed him in the back and arm. The men then stole his property and ran off, according to police.

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The victim was taken to Advocate Illinois Masonic Medical Center in serious condition.

Police did not have a description of the robbers, and no one was in custody Monday morning.

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Area North detectives are investigating.