CONWAY, Ark. (AP) — The owner of a plant that has made school buses in Conway for decades says that will end soon, affecting up to 477 jobs at the facility.

IC Corp.'s parent company, Warrenville, Ill.-based Navistar, told employees Thursday it would cease bus production operations at its Conway plant.

"We have to consolidate our bus-assembly operations into one facility," Navistar spokesman Roy Wiley said. "Unfortunately for Conway, Tulsa is a much newer facility."

He said the economy has reduced orders from school districts. Wiley said a smaller operation would continue at the plant, making parts for buses.