The CBI raided Congress Karnataka chief DK Shivkumar's premises on Monday morning in connection with an alleged corruption case. The raid are on at 15 locations in Karnataka, Mumbai and other places, reports said. Karnataka Congress has called raids political vendetta and an "attempt to derail party's preparation for bypolls". Apart from DK Shivakumar, premises of his family members and his associates are also being searched in Karnataka and Maharastra.