A 78-year-old Huntley woman was injured in a Saturday afternoon crash on Interstate 39 south of Tonica that remains under investigation, state police said.

Patricia O’Connor was northbound on I-39 when, around 2:21 p.m., her vehicle left the roadway and entered the center median around milepost 43, about five miles south of the Tonica exit. The vehicle continued north along the center median, and dropped into a creek, landing upright.

State police said O’Connor was transported to an unspecified area hospital. O’Connor was listed in critical condition Tuesday in Rockford Memorial Hospital.

No citations have been issued to date, police said. This incident remains under investigation.

LaSalle County