Of the new cases, four patients were detected at Hanoi's National Hospital for Tropical Diseases, which has been locked down as a Covid hotspot. The northern Vinh Phuc Province recorded 13 cases, Da Nang seven, the northern province of Bac Giang six, while Hanoi and Lang Son and Nam Dinh provinces recorded one each.

Da Nang, which has recorded 60 cases in the latest wave, locked down An Don industrial park in Son Tra District with around 1,000 workers Tuesday night after dozens of people associated with the park tested coronavirus positive.

All the workers and around 200 people living and trading around the park will be tested for the coronavirus.

Since April 27, Vietnam has logged 562 local cases of Covid-19 in 26 cities and provinces.

Nearly 900,000 of the country's 96-million population have received either one or two shots of the Covid-19 vaccine.