BEIJING (Reuters) - China on Friday warned its nationals in Pakistan of plans for a series of imminent “terrorist attacks” on Chinese targets there, an unusual alert as it pours funds into infrastructure projects into a country plagued by militancy.

Thousands of Chinese workers have gone to Pakistan following Beijing’s pledge to spend $57 billion there on projects in President Xi Jinping’s signature “Belt and Road” development plan, which aims to link China with the Middle East and Europe.

Protecting employees of Chinese companies, as well as individual entrepreneurs who have followed the investment wave along what is known as the China-Pakistan Economic Corridor, has been a concern for Chinese officials.