The woman was shot twice outside the front entrance of the Hilton Chicago/Oak Brook Hills Resort & Conference Center at 3500 Midwest Road, according to Village of Westmont spokesperson Larry McIntyre.
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The woman was taken to Good Samaritan Hospital with non-life-threatening injuries, McIntyre said.
The suspect fled the scene and is not in custody, according to McIntyre. It's not known what led to the shooting.
This is a breaking news story. Check back for updates.