Ludhiana, June 20 -- Around 6.8 lakh voters in Ludhiana district could not be mapped during the Election Commission of India's pre-Special Intensive Revision (SIR) exercise that concluded last week, with officials successfully tracing and verifying only 20 lakh of the district's 26.83 lakh registered electors.

According to officials, the eight-month exercise achieved a mapping rate of 76.5% and the remaining voters will be covered during the SIR process, which is scheduled to begin on June 25.

Election tehsildar Rajan Dhall said block-level officers (BLOs) physically verified voters at their registered addresses across villages, towns and urban areas during the exercise.

"Our BLOs took the electoral rolls and attempted to trace every r...