PRAYAGRAJ, Aug. 8 -- Two construction workers allegedly died after inhaling toxic gas while cleaning a septic tank at an under-construction house in the Dairi-Nevada Samogar area under the Naini Industrial Area police station limits on Friday morning, police said.

The victims, identified as Nihal Shukla (30), son of Mathura Prasad, and Rajat Shukla (29), son of Vinod, both residents of Bendau village, had entered the newly constructed septic tank to remove shuttering when they allegedly lost consciousness after inhaling toxic gas. The two were relatives, police said.

On receiving information, ACP (Karachhana) Sunil Kumar Singh, Industrial Area police and a fire brigade team rushed to the spot. Firefighters sprayed water inside the tank ...