Anti-China protests in Vietnam started earlier this month, following China's deployment of an oil rig near the Paracel Islands in the South China Sea, which sparked sea skirmishes.

Rioters soon turned their focus on Chinese-owned factories and attacked them, resulting in more than 20 deaths.

Riots took place mostly in the southern province of Binh Duong. Factories of the Vietnam-Singapore Industrial Parks in the province were among those targeted.

Local authorities have urged demonstrators to comply with laws and promised that measures will be taken to ensure the safety and property of investors at industrial parks.

This is one of the worst breakdowns in Sino-Vietnamese relations since a brief border war in 1979.