Police found nothing suspicious at Mumbai's CSMT station after a bomb threat call. Security was tightened amid a festive rush, and an investigation is underway. Mumbai: Police and security agencies were put on high alert following a bomb threat targeting the Chhatrapati Shivaji Maharaj Terminus (CSMT) Railway Station in Mumbai, officials said on Sunday. According to the officials, the threat was received at approximately 6:50 p.m.