Panic gripped St Stephen’s School in Sector 45 here on Monday morning following a bomb threat, prompting a massive search operation by the police.Continuing a series of hoax threats targeting educational institutions, the school reported a message warning of a bomb on the premises. Acting swiftly, bomb detection squad, dog unit, and senior police officers reached the spot, sources said.A thorough check was carried in the school premises before authorities declared the area safe.Police have been put on high alert and are maintaining heightened vigilance to prevent panic and curb the spread of rumours.