Bloomberg:

Apple Inc. suspended new business with iPhone assembler Pegatron Corp. after discovering labor violations at a student workers’ program, taking strong action to clean up a Chinese-based production chain long accused of worker abuse.

And:

[Apple] said it discovered several weeks ago that the Taiwanese manufacturer misclassified student workers and allowed some to work nights and overtime in violation of Apple’s Supplier Code of Conduct.

And:

“The individuals at Pegatron responsible for the violations went to extraordinary lengths to evade our oversight mechanisms.”