The probe agency has issued summons to Samal and his son Prayaskanti in connection with Barapada Engineering College land irregularities, they added.
The Naveen Patnaik-led party bagged 112 of the 146 assembly seats despite the Modi wave in the country.
Patnaik, won his his home turf Hinjili by over 60,000 votes, while he was leading from Bijepur till early on Friday morning.