SHANGHAI – China state media are accusing Foxconn of forcing local staff to work excessive overtime, while exploiting interns, say published reports.

University researchers surveyed 1,736 workers at the EMS company’s factories in nine cities. They learned, per reports, that employees work an average 83.2 hours overtime monthly, more than twice the maximum 36 hours stipulated by Chinese law.

Survey results also showed workers claiming Foxconn cheated them out of overtime payments, while making interns work more than the legal eight-hour day.

The firm is also accused of providing insufficient checkups for exposure to harmful substances, reports say.

Foxconn, which has been under fire for low wages and the suicides of more than a dozen workers this year, has not publicly commented on the survey results.