In a park in front of the Chinese embassy demonstrators waved flags, sang patriotic songs and chanted "Down with China!" and "The Spratlys and Paracels belong to Vietnam", referring to archipelagos in the South China Sea.
China and Vietnam have tussled in recent weeks over long-standing maritime disputes, though a military clash seems unlikely, the tensions could trouble regional diplomacy and possibly draw in the United States, which took up the South China Sea dispute last year.