Based on information, a police team raided a lodge in Suryapet town of the district in Telangana, around 100 km from here, and caught the accused, Nageswar Rao, with the girl, a class X student, they said.
Earlier, the minor's parents approached Suryapet police and lodged a complaint alleging their daughter had been abducted by her schoolteacher, Deputy Superintendent of Police (Suryapet Sub-Division) Mohammed Abdul Rashid told PTI by phone.
He said police caught Rao, who is in his 30s, at the lodge along with the teenager and later put him under arrest.
An officer associated with the probe said Rao was already married and has two children.
"He allegedly had an affair with the girl for the past one year. The girl has been sent for medical examination," he said, adding further probe was on.