Of the city’s new cases, 450 are already in quarantine and isolated areas while the remaining 150 are being contact traced.

Nine new cases in the northern Bac Giang Province and six patients in Hanoi had already been quarantined following contact tracing.

Among three new cases in the northern Hung Yen Province, two had returned from HCMC, and one had close contact with a confirmed Covid-19 patient.

Three new patients in the southern province of Ba Ria-Vung Tau had already been isolated after having close contact with confirmed patients.

Ninh Thuan Province in the south central region registered two new cases, with one having close contact with Covid-19 patient and the other returning from Dong Nai Province, a hotspot bordering HCMC.

The two new cases in the central province of Ha Tinh had returned from HCMC while the two patients in the south central province Binh Thuan had been already isolated.

The northern city Hai Phong, Binh Dinh, Thanh Hoa in central Vietnam and Dak Nong, Lam Dong in the Central Highlands registered one case each, with all detected in quarantine zones.

Since April 27 when the new wave started in Vietnam, infections have been recorded in 58 of the nation's 63 cities and provinces, with HCMC accounting for most cases, 12,658.

So far on Sunday, Vietnam has recorded 1,238 new local Covid-19 cases, including 1,043 in HCMC.