<br/>The Gujarat Police has started investigations in connection with visit of suspected terrorist David Headley arrested by FBI in US.<br/><br/>According to police sources, Headley had visited Ahmedabad along with some other cities of the country.<br/><br/>Police is also investigating the suspected role of Headley in the Kalupur Railway Station bomb blast in Ahmedabad during 2005.<br/><br/>AIR Ahmedabad Correspondent reports that following the alert by the Union Home Ministry to the five States, the Gujarat Government has launched ‘operation- Savdhan’ to spread awareness among the public.