Apple's iPod supplier Foxconn has admitted to breaking Chinese employment law.

The Hon Hai Industry-owned company has been under the microscope since the Mail on Sunday published claims that many workers on its iPod production lines were poorly paid and overworked.

Apple has launched an investigation into the claims, and Foxconn executives have moved to quash any such rumours.

However, a report on China CSR reveals that Foxconn has confessed that its employees work about 80 extra hours each month, "which is against the law in China," the report claims. Under Chinese law a company cannot ask its employees to work more than 36 hours overtime each month.

Despite this, Foxconn insists that it pays its workers according to local minimum wage agreements.