Jaipur, May 28 -- Four workers died by inhaling toxic fumes after they entered a 10-foot deep septic tank underneath a jewellery factory in Jaipur to try and retrieve gold and silver particles from the sludge, police said on Tuesday. The incident took place on Monday night in Sitapura Industrial area of Jaipur when eight workers were employed to recover gold and silver particles lost during the washing of jewellery from the toxic sludge. "The workers initially refused to do the work because of the hot weather that may cause buildup toxic gas in the tank," Sanganer police station house officer (SHO) Anil Jaimani said. "Vikas Mehta, the CEO of the company that owns the factory, and director Arun Kothari convinced the workers to go into the tank by offering them extra money." While cleaning the tank, however, the workers lost consciousness. Police reached the site upon receiving information about the incident, the workers were brought out of the tank. The workers were rushed to a local hospital, where doctors declared four of them dead. The deceased were identified as Rohit Pal, Sanjeev Pal, Himangshu Singh, and Arpit Yadav -- all between the ages of 25 to 30. "No FIR was lodged. It will be done after a thorough investigation," the SHO added. Meanwhile, the NHRC has directed the district administration to submit a detailed investigation report by June 16. A notice was also issued to Arun Kumar and CEO Vikas Mehta to submit their response by June 16. htc...