NILES, Ill. — A man was arrested Thursday morning in Niles after he lifted his shirt up to show a handgun he had in front of a school, according to police.

Officers were alerted to the man around 8:45 a.m. in front of Notre Dame College Prep, which is in the 7600 block of West Dempster Street.

According to a press release from the Niles Police Department, witnesses saw the man lift up his T-shirt as he was walking across the street and saw a handgun.

Officers found the man around 9:10 a.m. at a nearby Pace bus stop and found the semi-automatic handgun in his waistband, according to the release.

The Cook County State’s Attorney’s Office charged Carlos Kamber, 51, of Chicago, with aggravated unlawful use of a weapon, a Class 3 Felony and aggravated assault, a misdemeanor, according to the release.

A bond hearing is scheduled for Friday, according to the release.

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Staff members at the school were notified of the incident and no one was allowed to enter or leave the school while they were investigating.