Officials say a school bus crash in west Tennessee has killed two students and injured at least seven other people. The Tennessee Highway Patrol says the crash involved a Tennessee Department of Transportation dump truck, a Chevrolet Trailblazer and the school bus. The crash happened at about noon Friday on Highway 70 in Carroll County. Officials say the school bus was carrying students and employees from Kenwood Middle School in Clarksville for a field trip to Jackson, Tennessee. The cause of the crash is under investigation. The school’s principal, Karen Miller, said counselors will be available starting Monday.