According to officials, the case is based on Karnataka Police FIRs and chargesheets related to a 2017 hacking incident involving national and international websites.
The searches targeted the residences of former MUDA officials, a builder, a developer, and former zilla panchayat member Rakesh Papanna, who is also a close aide of Chief Minister Siddaramaiah.
A team of more than 20 ED officials, accompanied by central paramilitary forces, raided the MUDA office in Mysuru and other locations, scrutinising documents related to the case.