All three died in a hospital in Da Nang, a hot spot with more than 100 cases in the past week, more than half of them patients.

The city reintroduced social distancing measures over the weekend after the government confirmed the first domestically-transmitted cases of coronavirus in more than three months.

Vietnam, widely seen as a success in dealing with the coronavirus, reimposed a social distancing order in Da Nang following the confirmation of the cases, the first known to be locally transmitted in the country in over three months.