A 24-year-old Cottrellville Township woman was killed Friday night when her vehicle collided head-on with another vehicle on Marine City Highway.

According to St. Clair County Sheriff Tim Donnellon, the woman was driving eastbound on the highway shortly after 9 p.m. when her vehicle crossed over the centerline. She initially hit a pickup truck, forcing that vehicle off of the roadway. Then a second vehicle drove off of the roadway to avoid hitting the woman and she collided head-on with another vehicle. That driver was taken to the hospital for treatment.

The 24-year-old woman was pronounced dead at the scene. The accident is under investigation.