PRINCETON – Three people from Indiana are dead after a crash on Interstate 80 in Bureau County on Thursday. The Illinois State Police say a car was traveling westbound near mile-marker 40 around 2:40 PM when for unknown reasons it struck the rear of a slowed or stopped tractor trailer. The three occupants, all from the state of Indiana, were killed. Identities were not released, but authorities confirmed a 26-year-old male, a 22-year-old female, and a 1-year-old girl were pronounced dead at the scene. The crash remains under investigation by the Illinois State Police and the Bureau County Coroner.