Twenty-seven Class 9 students of an Odisha government-run residential school were allegedly beaten up by senior Class 10 students in Rayagada district, police said on Tuesday. A group of Class 10 students scolded the junior students because they were late returning from the playground on Sunday. When the junior students complained about this matter to the school authority, the Class 10 students again assaulted the juniors using wooden bats, the official said. When police personnel reached the school, the senior students had fled the spot, he added. The Rayagada district administration has issued a show-cause notice to the headmaster of the school, said a senior officer.