Muthulakshmi, whose parents are farm labourers from Dindigul district, was playing in the farm land at Suryapalli when she fell into the 900-feet deep borewell, which had been crudely closed after it failed to yield water, they said.
The borewell was to be properly closed today but before that the mishap occurred. The diameter of the borewell was 12 inches upto 12 feet and nine inches beneath.
Fire and Rescue Service personnel along with police are engaged in efforts to rescue the girl by digging a pit adjacent to the borewell.
The girl's voice was audible till about 5 pm, they said.