Bhubaneswar, May 27 -- Six persons died and one fell sick on Tuesday due to asphyxiation after allegedly inhaling carbon dioxide inside an under-construction septic tank in Odisha's Kalahandi district. The deceased were identified as Nimai Pal (48), owner of the house where the tank was being constructed, and his son Akash Pal (28), both residents of Karlakhunta village; Adal Majhi (55), Manoranjan Hati (27) of Matoganda village, and Chhanda Jal and Bipul Jal of Duta village. The incident took place in Karlakhunta village under Madanpur Rampur police limits when centring-related work on the septic tank was underway. Preliminary reports suggest the mishap occurred during the removal of centring materials from the tank, which may have contained toxic gases. P4...