17 of the new cases were linked to the Hanoi Lung Hospital, bringing the total infections at the facility to 27.

The rest were found in a number of districts including  Bac Tu Liem (1), Dan Phuong (2), Dong Anh (1), Dong Da (2), Gia Lam (1), Ha Dong (1), Hai Ba Trung (1), Hoai Duc (1), Hoan Kiem (1), Hoang Mai (5), Long Bien (2), Phu Xuyen (3), Quoc Oai (1) and Ung Hoa (2).

Among them, three cases were in connection with a cluster at 90 Nguyen Khuyen, Dong Da district, two returning from Ho Chi Minh City, one related to a cluster in Hoang Mai district and one linked to a cluster in Hai Ba Trung district.

Pham Huu Thuong, Director of the Ha Noi Lung Hospital, said the source of the transmissions at the hospital has not been identified yet because all the patients tested negative for SARS-CoV-2 upon admittance. The hospital has been locked down for 14 days.  

Hanoi has recorded more than 770 COVID-19 cases in the fourth wave of coronavirus that began in late April.

The city is now under a two-week social distancing order.