They could not swim, villagers told the police
According to reports, Sandhya had ventured into the coffee estate along with two others
Parents and neighbours rushed the boy to Government Taluk Hospital in Gudiyatham where he succumbed to injuries
It's believed the manhole cover on the city's Fifth Avenue was dislodged by a truck minutes before incident.
The incident occurred when a large mass of earth caved in while the labourers were placing concrete rings along the periphery of the well