India, Aug. 20 -- A Class 9 student, who was upset about his physics teacher slapping him in class on Monday, returned on Wednesday with a country-made pistol and shot him in the classroom, police said.

The student has been detained and will be produced before a juvenile justice board on Thursday, said additional superintendent of police (Kashipur) Abay Pratap Singh.

The student told the police that the physics teacher had slapped him on Monday despite correctly answering a question posed to him. He procured a country-made pistol and shot him to take revenge, a police officer said, citing the teenager's questioning.

The bullet hit the teacher on his shoulder. He was taken to a private hospital by school authorities and is out of danger...