According to an FIR lodged by his family members at the town police station, Onkarmal Agarwal boarded the Brahmaputra Express in Delhi and called home after getting down at Sahibganj yesterday morning, they said.
After that his mobile was switched off and he could not be contacted so far, they complained.
The family has named two persons whom Agarwal was supposed to meet, they said.
SP (Special Cell, Ranchi) Mayur Patel and DIG Priya Dubey are supervising the raids being conducted at different places in the district to trace the missing businessman, police said.