J. Balaji NEW DELHI: The Election Commission has warned the District Election Officers and the Returning Officers that they would be personally held responsible if there was any report of employment of child labourers for poll-related works. Taking cognisance of a photograph published by The Hindu on Thursday wherein children were seen carrying the Electronic Voting Machines (EVMs), prior to the third phase of the Lok Sabha polls in Bhagalpur constituency in Bihar, the Commission said the use of child workers was