Three Indian workers have died at a Tata Electronics factory that makes iPhone components in the southern state of Tamil Nadu, in the latest supply chain incident to affect Apple at a major manufacturing hub outside China.
The deaths occurred late Monday and will be investigated by Apple, Tata and state authorities, officials said.
The three contractor workers died during maintenance work at a treatment plant, district official Dinesh Kumar said. They reportedly inhaled gas while testing a nanofiltration tank.
In recent months, Tata factories, which account for about 40% of iPhone production in India, have faced fires, contamination concerns and data leaks.
About a quarter of the world's iPhones are now made in India, as Apple has expanded its manufacturing base beyond China.