Several people were treated by paramedics at a Loop restaurant early Sunday morning when a person used mace inside of the building, police say.
According to authorities, the incident occurred in the 200 block of North Wabash Avenue at approximately 12:53 a.m.
Officers observed several people running out of a restaurant, and when they stopped to investigate, they found that a man had used mace inside of the eatery before fleeing the scene on foot.
Police were given a description of the man, and were able to locate him nearby, according to authorities.
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Several people were affected by the mace, and were treated and released by paramedics at the scene.
Area Three detectives are investigating the incident.