Bolton's tweet comes amid reports of a large-scale standoff between Chinese and Vietnamese vessels in the South China sea. According to a report by Straits Times, Vietnam has demanded China to remove an oil exploration ship from disputed waters near the Spratly Islands.
It may be noted that the United States and China are at loggerheads over military deployment in the Indo Pacific region.
While Beijing has protested against US freedom of navigation exercises in the South China Sea, Washington and China's southeast Asian neighbours are concerned about Beijing's military build-up, reports South China Morning Post.
The South China Sea is one of the most contested regions in the world. China, the Philippines, Vietnam and others have overlapping territorial claims on the sea.