The bus caught fire after the wire fell on it on Sunday night in Baiman Loria village. The passengers were going to attend a marriage function.
The villagers threw stones and blocked road in anger due to delay in rescue operations.
They alleged that the police came after an hour and even the power supply department took no action when informed, they added.
The situation was brought under control with the help of additional force deployment.
S.K. Verma, an officer at state-owned Dakshinanchal Vidyut Vitran Nigam Ltd. said officials were sent to the site and strict action would be taken after an inquiry.
The injured were shifted to the district hospital.