The government on Monday found 35 preliminary positive Covid cases during overnight lockdowns of three housing blocks in Kwun Tong and Tin Shui Wai.
A total of around 3,300 residents from Choi Lok House at Choi Fook Estate, as well as Shing Yuk House and Shing Chun House at Tin Shing Court were tested.
Officials said nine of the patients were found in Tin Shui Wai and the rest were from the Kwun Tong block.
The test results for 14 people from Tin Shing Court were uncertain.
Meanwhile, officials visited 1,439 households during the operating, but 116 did not answer the door.
