A young woman died in a single-vehicle crash early Saturday morning near Millstadt in St. Clair County.

Emergency personnel responded shortly before 5 a.m. to Route 163 southbound near Cemetery Road north of Millstadt after Illinois State Police said a Toyota passenger vehicle left the roadway for unknown reasons and struck a tree. 

The driver and sole occupant was pronounced deceased by a St. Clair County coroner’s official at the scene, ISP said. 

The crash victim was identified as Colleen C. Jacob, 28, of Millstadt. 

Route 163 was shut down for a crash investigation and reopened to traffic about four hours later, police said.

In addition to ISP, responding agencies included Millstadt EMS, the Millstadt Fire Department, and Millstadt and Cahokia police. 

“Upon arrival, first responders located a vehicle fully involved in flames,” Millstadt EMS posted on Facebook. “After the fire was extinguished, it was determined that there was an occupant inside the vehicle.”

According to her LinkedIn profile, Jacob worked as a permanency adoption specialist for Caritas Family Solutions.