Probe into Friday's threats reveals threat email was sent from outside the country. Over 70 schools receive threats in a week

According to police, the student sent the email to his own school, and after tracing the IP address, they located the student’s home. Upon questioning, the child admitted to sending the threat and was later counselled. He was let off with a warning, and his parents were advised to monitor his behavior.

Delhi Public School in RK Puram, Ryan International School in Vasant Kunj and Gyan Bharati School in Saket receive same email from same sender.