China National Petroleum Corp. says its facilities in Libya were attacked, and that its employees have been evacuated back to China.

A statement issued Thursday on CNPC's website mentions that its project and job site were under attack, prompting an order for all staff to withdraw. It does not mention the location of the facility or any other details.

State-run CNPC says it has five subsidiaries and 391 Chinese staff in Libya. The first 24 workers were repatriated by Thursday.

The company said it was doing "everything possible to protect its projects and assets and ensure the safety of its employees."