Overview

• The crash occurred just after 5 a.m. on southbound Interstate 55 north of Cass Avenue near the Darien–Willowbrook border.
• Illinois State Police confirmed at least one person died in the single-vehicle rollover.
• All southbound lanes of I-55 near Cass Avenue were shut down following the accident.
• The Illinois State Police have launched an active inquiry into the cause of the crash and the extent of injuries.
• Authorities have released few details and have not indicated when traffic will resume on the closed lanes.