Foxconn confirmed on Thursday that some interns have worked overtime, adding that action had been taken to correct the situation, the company said in a note sent to the Global Times.
Several students reportedly claimed that they worked overtime in a facility of Foxconn in Zhengzhou, Central China's Henan Province, according to an earlier report by the Financial Times.
Hon Hai Precision Co, also known as Foxconn, is a major manufacturing partner for US company Apple Inc.
The interns said they routinely worked 11-hour days assembling the iPhone X, as part of an internship program allegedly forced upon them by their school.
Those students, aged between 17 and 19, were told that a three-month stint at the factory was required work experience to graduate, noted the media report.
"Our policies do not allow interns to work more than 40 hours per week on program-related assignments. Unfortunately, there have been a number of cases where portions of our campuses have not adhered to this policy," the manufacturer said in the note.
"We have investigated all of the cases, and confirmed that while all work was voluntary and compensated appropriately, the interns did work overtime, in violation of our policy," it said.
The manufacturer also said that it will continue to review the internship program and make sure this situation doesn't occur again.
Labor rights groups have previously criticized Apple and Foxconn for excessive overtime, hiring underage workers and failing to provide health insurance, Reuters reported on Thursday.
