Bomb Threat in Delhi Schools: Police Found Nothing During Investigation, Why the Threatening Email?

ABP News: Bomb threats have been received in many schools of Delhi. At present the bomb disposal squad is also present at the spot. The search operation is going on. Many such threats have been received in Delhi before as well... There are reports that an email threatening to bomb more than 100 schools in Delhi was received, which has created a sensation. Police and fire department teams are present in the schools... The threat sent through email said that we will 'bury people in the buildings'...