Authorities locked down another building in Kwai Chung at 4 am on Saturday morning because one positive Covid case, as well as two preliminary positive cases (with preliminary test results involving a mutant strain) live there.

Residents of Ying Kwai House at Kwai Chung Estate are required to be tested before 1 pm on Saturday, regardless of their vaccination status, and will not be allowed to leave their homes until the results are mostly ascertained.

A government spokesperson says the operation is expected to finish at around 7 pm on Saturday.

On Friday nearby Yat Kwai House was locked down for five days after more than 20 cases were linked to the block.