CBI has booked, Ratul Puri the nephew of Madhya Pradesh Chief Minister Kamal Nath in connection with a 354-crore rupees bank fraud case. Official sources said besides Puri, who is a former executive director Moser Baer, four other directors of the company have also been booked by the CBI.<br />''  <br />'' Earlier today, the agency carried out searches at six locations in Delhi including the residences and offices of the company and the accused directors.  <br />