Sarath Kumar from Krishnagiri district was operating the JCB machine this afternoon when concrete debris from the building fell on top of the machine, killing him instantly, they said.
"The machine toppled under the impact, killing Sarath Kumar instantly," an official said.
He was taken to Royapettah General Hospital were doctors declared him dead on arrival, he said.
Demolition work was temporarily suspended after the accident.
The May 31 fire in the seven storied building on arterial Usman Road in the shopping hub of T Nagar had gutted the building.
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