Published - December 26, 2025 03:17 am IST - CHENNAI The ED had engaged IIT-Kanpur as part of its probe into alleged large-scale irregularities in sand mining and resultant loss to the State exchequer. | Photo Credit: The Hindu The Tamil Nadu government has alleged that a survey, purportedly conducted by scientists of the Indian Institute of Technology (IIT)-Kanpur at the behest of the Directorate of Enforcement (ED) was “illegal”, contending that the institute lacked jurisdiction and had no locus standi to operate in the State. According to official sources, the State government wrote to IIT-Kanpur seeking details of the survey, including the scientists involved and the basis on which the assessment of sand mining along riverbeds in Tamil Nadu was carried out.