As the state government gears up to conduct a new survey on child labourers, activists have urged the labour department to fix loopholes to get a near accurate picture of the ground situation.

The survey in Bengaluru Urban district in 2017-18 had pegged the number of child labourers at 3,344. Bengaluru City, the report said, has the second-highest number of child labour cases next only to Raichur district. But child rights activists disagree with the figures, insisting the number is only tip of the iceberg.