An official of the central education board CBSE was suspended and three men were arrested today over the leak of Class 12 economics board exam papers. The arrested men included two teachers of a private school in northwest Delhi, who leaked the paper nearly 2 hours before the exam, the police said. A tutor of a coaching centre, to whom they sent images of the solved paper, has been arrested too. The suspended CBSE official was in charge of the exam centre where the leak took place, the government said.