Motorola Inc. has sued four former software engineers working at its Libertyville and Schaumburg offices, for alleged theft of $600 million in trade secrets, on its en route to China, said officials.

Former employee Hanjuan Jin, 37, who worked at Schaumburg office was indicted by a federal grand jury in April on three counts of theft of trade secrets and is facing charges of computer fraud and abuse, misappropriation of trade secrets and breach of fiduciary duty in the lawsuit.

Three other former employees- Xiaohua Wu, Xuefeng Bai and Xiaohong Sheng were slapped with allegations of computer fraud and abuse, misappropriation of trade secrets and breach of fiduciary duty in the lawsuit.

Motorola has called for regression of all information in defendant’s possession and compensatory damages of $5,000.