India, July 19 -- Delhi's wave of bomb hoaxes continued for the fourth straight day on Friday, with 45 schools and three colleges receiving a mass email overnight warning of explosives planted on their campuses. Discovered by staff on Friday morning, the threat mail yet again triggered evacuations, search operations, and fresh anxiety over what appears to be a calculated attempt to spread panic across the city's educational institutions.

The email, seen by Hindustan Times, was sent from roadkillmentalhospital@atomicmail.io at 10.53pm on Thursday.

Titled "'Roadkill' via SV Info", the message was marked to 45 schools - several of them marked twice. The sender wrote, "I am writing to let you know that I have placed several explosive device...