Health authorities on Friday found 946 Covid cases from overnight lockdowns of residential blocks in Tuen Mun, Wong Tai Sin, Sha Tin, Aberdeen and Sham Shui Po, after the virus was detected in sewage samples.

Among them, 134 preliminary-positive cases were picked up from Tip Chui House in Butterfly Estate, 57 at Block 5 of Po Tin Estate and 136 at Wu Fai House in Wu King Estate in Tuen Mun.

Pak Fung House and Yuk Lun House of Wong Tai Sin’s Choi Wan (I) Estate detected in total of 296 cases, while Fei Fung House from the same estate picked up 88 cases.

There were 120 cases at Sheung Sam House in Sha Tin's Lung Hang Estate.

Authorities also found 61 infections from Lei Yee House of Ap Lei Chau Estate in Aberdeen.

In Sham Shui Po, 54 residents in Fu Hoi House and Fu Yee House of Fu Cheong Estate tested positive for the virus.

In total, about a hundred indeterminate cases were detected, and the government said it will follow up on the results.

Separately, officials on Friday locked down another ten blocks across Tuen Mun, Kwai Chung, Wong Tai Sin, Kwun Tong, Tseung Kwan O and Aberdeen, also after the coronavirus was detected in their sewage samples.

They include Block 4 of Po Tin Estate; Tip Sum House of Butterfly Estate; Fu Man House and Fu Pong House of Tai Wo Hau Estate; Kai Fai House; Choi Wan (II) Estate, Ping On House, Tai On House and Yee On House of Wo Lok Estate; Kin Ching House of Kin Ming Estate; and Lei Fook House of Ap Lei Chau Estate.

The operations are expected to wrap up at around midday Saturday.