Three died in an incident at Nalco Water at a Tata Electronics utility factory in Tamil Nadu, which makes components for Apple iPhones.

Three contract workers suffocated while cleaning a wastewater tank at the Hosur facility. The deaths have triggered investigations into workplace safety practices and possible violations.

CHENNAI: Three contract workers have died at a Tata Electronics factory that makes parts for Apple iPhones in India's southern Tamil Nadu state, the latest supply chain incident affecting the US company in its most critical manufacturing base after China.The deaths, which occurred late on Monday (Nov 9), will

According to the police, the three workers were engaged in cleaning a wastewater storage tank known as the Nano Filter (NF) Tank.

The incident took place on Monday evening at a utility facility operated by Nalco Water, an Ecolab company, inside the Tata Electronics premises. Police said the workers were desilting an effluent treatment plant storage tank when they were exposed to poisonous fumes and severe oxygen depletion.