Police in Mumbai initiated an investigation following an email threat which warned of bomb blasts at several targeted spots in the city, such as the mayor’s chamber, Amitabh Bachchan’s house, Chhatrapati Shivaji Maharaj International Airport and Jalsa.

The officials said the threatening e-mail had referred to several notable buildings, which had caused a special concern for security authorities and prompted them to conduct all necessary checks.

The city’s mayoral office and bungalow Jalsa, belonging to Bachchan was among the addresses mentioned in the email. The message also mentioned the Chhatrapati Shivaji Maharaj International Airport, one of the busiest airports in the country.

The source of the email will be scrutinized and the individual or group that sent out the threat will be tracked. The security will also perform Searches and Inspections at the places mentioned in the message as a routine measure to be taken during security visits.

There was no breakdown information to give on the validity of the threat or whether any suspicious objects had been discovered.

Police and other security officials are probing the incident, and greater security will probably be maintained at the sites referenced in the threatening email.

A bomb threat to a well-known public site will also set into motion comprehensive security measures, such as some searches and technical query to determine where the threat was coming from.

More information has yet to be out on the issue and Mumbai police are continuing with their probe.