What happens when bomb threat made to educational institution or airline is found to be hoax? How does law punish caller?

Multiple schools in Delhi have been targeted with bomb threats, prompting immediate police action. The incidents highlight ...

Over 40 private schools in Karnataka's Bengaluru received bomb threat messages via email on Friday morning, officials said.

While in Delhi, 20 schools got 'hoax' bomb threats via email, 40 schools in Bengaluru were sent a similar message.