FIRs were registered against 11 people, including Turuvekere MLA MT Krishnappa of JDS, Tumakuru Rural MLA B Suresh Gowda and city MLA GB Jyothiganesh, both from BJP.
The project, estimated to cost around Rs 1,000 crore, was commissioned during the Congress-JDS government in 2018, and work started when the Congress came to power in 2023.
Often blasting at stone mining units nearby government and forest land impacts adjacent villages where the people often reportedly experienced vibrations.