Nanjangud: In a tragic incident, three persons, who had gone to a water tank for washing cattle ahead  of a village festival, died of drowning near Kamanahalli  in Biligere hobli of Nanjangud taluk this morning. The deceased have been identified as Vinod (19), Muddegowda (48) and Basavegowda (45), all residents of Kamanahalli. The three had…