Apple's largest iPhone producer has reportedly ordered hundreds of its India-based Chinese workers to return to their native China but for unspecified reasons.

While China remains the primary hub for iPhone production, Foxconn has steadily expanded its footprint in India over the past few years.

In a major blow to Apple Inc.’s manufacturing push in India, Foxconn Technology Group has asked several Chinese employees working at its iPhone factories in India to return home, foreign media reported.