Police on Tuesday said 24-year-old Chicago man Rayvon Savary is charged with aggravated discharged of a firearm, among other charges.
He was also cited for trespassing on CTA property.
Police said around 8 a.m. on Memorial Day, Savary allegedly entered a restricted underground CTA area near the Red Line station at State and Lake streets.
He then took out a gun and fired shots upward at two men who were walking on the sidewalk. No one was hurt.
Video shows police and a SWAT team surrounding the grate outside Chick-fil-A, across the street from ABC7's State Street studio.
Officers took Savary into custody about an hour after the shooting happened, police said.
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