At least three people died Friday afternoon when a school bus and a car crashed head-on on an Inver Grove Heights road, according to police. A little before 4 p.m., police and fire departments responded to a crash at 77th Street W. and Argenta Trail south of Hwy. 55. When they arrived, crews found both the bus and car on fire. Police found at least three people dead in the car. Their identities haven't been released. There weren't any children on the bus. The bus driver was uninjured. The cause of the crash is still unknown. Inver Grove Heights police, along with the Minnesota State Patrol, are investigating.