China has lodged solemn representations over to the United States for allegedly blocking Chinese students at the border, and issued a caution over travelling through Dulles International Airport, which is near the U.S. capital, the Chinese Embassy in the United States said in a statement on Monday.

The embassy accused U.S. authorities of "unwarrantedly" interrogating, harassing, cancelling the visas of and even deporting several students from China with valid travel permits upon their arrival at the airport.