Of them, 49 cases are in HCMC, 44 in epicenter Bac Giang, 28 are in its neighbor Bac Ninh, 20 in Hanoi and one in Da Nang.

The cases in HCMC are linked to a Christian religious mission cluster, raising the number of cases linked to this mission in the city to 143. Four other patients linked the cluster have also been reported in the southern Long An and Bac Lieu Provinces.

All cases Bac Giang have already been quarantined as they are linked to clusters at its industrial parks.

The new cases in Bac Ninh were recorded in three Covid-19 clusters in Thuan Thanh, Khac Niem and Que Vo districts.

Hanoi detected 17 infections through contact tracing and one case via mass testing. Another two cases was recorded at the capital's locked down National Hospital for Tropical Diseases.

The case in Da Nang is a 27-year-old woman who has made contact with a coronavirus case.

Vietnam recorded a total of 250 Covid-19 cases on Sunday.

The country's latest Covid-19 wave started on April 27 and has seen infections in 34 cities and provinces, including the largest cities and provinces housing major foreign manufacturing plants.

The religious mission cluster has raised HCMC's infection tally to 157, making it the fourth hardest hit locality after Bac Giang (2,118), Bac Ninh (804), and Hanoi (384). Da Nang comes fifth with 156 cases.