A fatal accident occurred on the evening of November 9 local time at a factory operated by Tata Electronics in India, located near Hosur in the Krishnagiri district of Tamil Nadu, which produces components for Apple iPhones. Three contract workers are suspected of having died from inhaling toxic gas while inspecting the nanofiltration tanks of the wastewater treatment facility. One worker lost consciousness first; the other two entered in succession to attempt a rescue and also lost consciousness. All three were confirmed dead after being taken to hospital, and their bodies have been sent for autopsy, with the exact cause of death pending the autopsy report. The wastewater treatment facility involved is operated by Nalco Water, a subsidiary of the U.S.-based Ecolab group, and the deceased were employed by an external contractor commissioned by it. Apple, Tata Electronics, and the local government are currently investigating the accident, reviewing on-site safety measures and operating procedures. The accident has not affected production; at the time of the incident, the factory was closed for the Diwali holiday. Tata Electronics is an important manufacturing partner for Apple in India, accounting for about 40% of India's iPhone assembly volume; currently, iPhones produced in India account for about a quarter of the global total.