Samajwadi Party supremo Mulayam Singh Yadav today postponed his election tour to Bihar following a technical problem in his chartered plane, party sources said here.
 
Yadav, who had to address election meetings at Kaimur and Nalanda reached Amausi airport this morning but could not go ahead due to a technical hitch in his chartered plane.
 
"There was some problem in the engine of the plane due to which it could not take off," they said.