Mumbai and Navi Mumbai on high alert after bomb threat emails target Mayor Ritu Tawde’s office, Amitabh Bachchan’s home, Diljit Dosanjh’s concert venue. Mumbai and Navi Mumbai areas were on Friday put on high alert following a bomb threat email sent to the Mumbai mayorrsquos office along with actor Amitabh Bachchanrsquos Juhu house and the venue of singeractor Diljit Dosanjhrsquos concertAccording to officials the bomb threat emails were also sent to several.