India, Sept. 29 -- At least 300 schools, institutes and airports in Delhi, Chandigarh, Shimla and other cities received threatening emails on Sunday morning warning of bombs planted on their premises, officials said. The mails, sent from an account identifying itself as "Terrorizers111," triggered security checks and panic before being declared hoax.

The email, addressed to school and airport administrations, read: "I am the leader of terroristic group also known as terrorizers 111, through heaven and earth in this accursed world which in never anything goes as planned I alone am the untouchable one, I can't push myself to my limits because I am the limitless one, I am the child of evil, I am the meaning of hatred. Bombs have been placed...