In a joint operation, teams from National Disaster Relief Force, nearby Hutti gold mines and fire brigade struggled to rescue Thimmanna Hatti, reportedly stuck at a depth of 160 feet in the 300 feet borewell.
Attempts to pull out the boy using a robot yielded no result as it hit a rock at a depth of about 140 feet, police and district officials present at the site said.
Deputy Commissioner P A Meghannanavar said the robot attempt had failed and it would take about five days to dig the pit and tunnel to reach the boy, who was being supplied oxygen to keep him alive.
As hundreds of people from the neighbouring areas gathered at Sulikere inhabited by about 2,500 people, police had to resort to mild laticharge to keep them in control as their movement impeded the rescue operations at times.
He said instructions had been issued to all police stations in the range to get affidavits filed by Gram Panchayats after survey that there are no open borewells.
District-in-charge minister S R Patil and senior officials of district administration and police are camping at the site overseeing the operation which continued overnight.
