VARANASI, Nov. 25 -- Three workers died of suffocation, while another was hospitalised, on Monday after allegedly inhaling toxic fumes inside a tank at a carpet dyeing unit here, an official said. The incident occurred at the Surya Carpet plant, located in Ugapur area, under the Aurai police station limits, when workers were carrying out cleaning and repairs inside a tank in the dyeing unit, police said. The deceased were identified as Shivam Dubey (38), Ram Surat Yadav (55) and Sheetla Prasad (50), all residents of Bhadohi district. According to SP Abhimanyu Manglik, one worker entered the tank for cleaning and repair work and lost consciousness due to inhalation of toxic fumes. Three others climbed down one after another to rescue him but all of them fainted due to suffocation and were later rescued by company staff who rushed them to Surya Hospital, owned by the carpet unit's proprietor Surya Mani Tiwari. Raj Kishore (48), a resident of Madhya Pradesh, who the other three tried to rescue, is stated to be stable, the officer said....