Apple has sent independent medical experts to one of its major contractors in China to probe employees' deaths.
The move from the electronic giant came after accusations that bad working conditions led to several workers' deaths.
According to China Daily, the company said that it regretted the deaths of labourers at Pegatron.
Apple added that it has commissioned independent medical professionals from the United States and China to conduct probes since last month.
It added that Apple has a 'long-standing commitment to providing a safe and healthy workplace for every worker in its supply chain'.
Pegatron, a Taiwan-based manufacturing company that supplies Apple, Sony and Dell, confirmed that four workers at its Shanghai factory, which has nearly 100,000 employees, had died of diseases, the report said.
The announcement came after New York-based advocacy group China Labor Watch said that several workers at Pegatron's Shanghai plant "passed away in a short period of time", it added.
