Search operation is on to find out the B Tech student of IIT-Guwahati who has been missing since Saturday. Final year student Ajay Kumar Yadav, who hails from Jaipur in Rajasthan, was last seen by his classmates on Friday. The student used to stay in IIT-Guwahati hostel. Classmates and teachers tried to call him on his mobile but found it switched off. IIT-G authorities have filed a missing person complaint in this regard at the Amingaon police station.