Police say Shalise Smarr of Cahokia cut another woman in the arm and back at the East St. Louis MetroLink station last month.
Smarr, 39, used a sharp object in the June 21 incident, the Belleville News-Democrat reports. The victim then sprayed Smarr in the face with mace, the newspaper quotes charging documents as saying.
Smarr has been charged with two counts of aggravated battery in a public place and one count of aggravated battery causing great bodily harm, according to the News-Democrat.