Barring a girl, who suffered a minor fracture, others were sent home after first-aid at a hospital, they said.
Police said the driver of the bus carrying boys and girls, lost control over the vehicle and it overturned.
"It was a miraculous escape and though the bus overturned, nothing major happened," a police official said.
Initial reports had suggested that more than 20 students were seriously injured, but the police loater clarified that only one had been hospitalised.