The illegal mining committed during 2006-11 in three districts of Karnataka has resulted in the state losing a revenue of Rs 3,414.45 crore and the government could recover only Rs 7.22 crore, a report by Comptroller and Auditor General (CAG) of India said.

In Chitradurga, Tumkur and Hospet divisions four lessees had extracted 1.47 million mt of iron ore valued at Rs 150.59 crore without the consent of the Karnataka State Pollution Control Board (KSPCB), the CAG report tabled in the Assembly said.