At least seven migrant labourers from Bihar are feared dead after a massive boulder caved in at a stone quarry in Bengaluru South taluk in the early hours of Thursday, 2 July. Several others sustained serious injuries, and rescue teams warn the death toll may rise as workers remain trapped beneath the debris.

How the Collapse Unfolded

The incident occurred at approximately 5 a.m. at the Kaveri Crusher unit in Madapatna village, under the jurisdiction of Tavarekere Police Station. Around 20 labourers were on site when a large rock face gave way without warning, crashing down on workers who were carrying out routine quarrying operations roughly 40 feet below the surface.

According to witnesses, blasting work had been conducted at the site a day earlier. However, eyewitnesses stated the collapse did not appear to be a direct result of that blasting — the boulder reportedly gave way suddenly while workers were drilling during regular operations.

Eyewitness Accounts

One witness described the chaos: 'The incident took place at around 5 a.m. when more than 15 to 16 workers were on duty. Some managed to run to safety, some were injured, and others were trapped beneath the boulder. It did not appear that the boulder fell because of the blasting itself; it collapsed suddenly while the workers were carrying out their routine work.'

Vinod, another worker who was present at the time, said the victims had just taken over from the night shift moments before the collapse. 'When the boulder collapsed, many workers were trapped beneath it. Some lost their legs, while others lost their hands. We could do nothing to rescue them. I was operating a Hitachi excavator and was about 10 metres away from the spot. The victims were drilling at the quarry and did not notice the boulder above them,' he said.

Casualties and Rescue Operations

Five labourers with serious injuries were shifted to RR Hospital for treatment. The identities of the deceased are yet to be established, though police confirm the victims are believed to be migrant workers from Bihar, with a few of the injured reportedly from Karnataka. Several heavy boulders also crushed excavation machinery, including earthmoving equipment, during the collapse.

Senior police officers and district administration officials have rushed to the site and are supervising ongoing rescue efforts. The bodies of the deceased are yet to be recovered from beneath the rubble, according to officials.

Investigation and Compliance

Officials stated that the quarry management had obtained the necessary permissions, including the lease, licences for quarrying operations, and clearances for the use of explosives. The exact cause of the collapse, however, is yet to be determined. Police have registered a case and launched a formal investigation into the incident.

This incident adds to a troubling pattern of quarry accidents across Karnataka, raising questions about on-site safety protocols and real-time geological monitoring at active quarry sites. Authorities have not yet indicated whether operations at the Kaveri Crusher unit will be suspended pending the probe.