The visit signals Washington's intends to remain the pre-eminent naval power in the South China Sea.

Vietnam has sufficient legal bases and historical evidence to affirm our sovereignty over the Spratly and Paracel islands in accordance with international law.

Vietnam demands China to investigate the case and compensate the victims.

Vietnam said China’s claims go beyond the United Nations Convention on the Law of the Sea (UNCLOS).

The intrusion takes places after a Chinese survey vessel and escorts violated Vietnamese waters for almost three months last year.