(Ward County, ND)  --  The North Dakota Highway Patrol says a school bus was rear-ended in Ward County outside Minot.  Troopers say the South Prairie bus and the other vehicle were going north on Highway 83 yesterday when the bus driver slowed to turn left and the SUV crashed into it.  Troopers say three juvenile passengers from the SUV and one student on the bus suffered serious but non-life-threatening injuries.  A spare bus came out to take home the remainder of the kids on the bus that weren't picked up from the scene by their parents.