According to the police sources, Rajesh Chendre (43) first entered into the septic tank and fell unconscious. On seeing Chendre in danger, Ashish Sharma (32) also entered into the tank to rescue him, but he also fell conscious.The sources said that at around 8.30 am, while entering into the tank, Chendre inhaled the toxic gas from the tank and fell unconsciousness off the ladder. Seeing this, Ashish Sharma entered into the tank to rescue Chendre, but he also fallen victim to the toxic gas.