Foreign companies in Vietnam have pleaded with authorities to stop a repeat of deadly mob violence that has triggered factory shutdowns and sparked fears about future security in the global manufacturing hub.

Some overseas businesses are planning to reopen today after anti-China riots in industrial parks around the country last week but others are likely to remain closed as fresh details of the extent of the violence emerge. More than 3,000 Chinese nationals have been evacuated from Vietnam since the violence erupted, China’s foreign affairs ministry says.

Mobs attacked more than a quarter of foreign companies in one southern industrial heartland, according to an official estimate, underscoring how protests against China over a maritime dispute with Vietnam have engulfed many companies from other countries, including Taiwan and South Korea.