(To watch the full press briefing with sign language interpretation, click here.)

The Centre for Health Protection today said it is investigating three additional COVID-19 cases, one of which is locally transmitted with an unknown source of infection.

The unlinked case involves a four-year-old boy who has two residences that are located at Yee King Building in Ho Man Tin and Block 13 of Pak Tin Estate in Shek Kip Mei.

At a press briefing this afternoon, the centre's Communicable Disease Branch Head Dr Chuang Shuk-kwan noted that the source of the boy's infection is under investigation.

"For the COVID-19 case of the four-year-old boy, the possible route of transmission is limited to his activities.

"He mainly stayed with his relatives in two places, so all of them will be put under quarantine and tested.

"And also, he attended a kindergarten in Ho Man Tin. Those who were in the same class as this child, and also teachers who had taught him, will be put under quarantine and tested.

"So hopefully we can find the possible source of infection for this case."

Dr Chuang added that special arrangements will be made for the children subject to quarantine.

"Because the close contacts in the same class are all very young, we will allow caretakers - usually the parents - to accompany the children to go to the designated quarantine hotel.

"I understand that the Food & Health Bureau has arranged with the Social Welfare Department the necessities to facilitate their stay in there, including the provision of some toys and books."

Due to this case, the two relevant residential buildings and the kindergarten are now covered in a compulsory testing notice.

Additionally, in relation to previous local cases involving the N501Y mutant strain, people who had been present at three specified premises during a specified period are required to undergo additional testing.

Specified people in relation to Block N2 of Kornhill in Quarry Bay and Royalton in Pok Fu Lam are also reminded to undergo compulsory testing tomorrow. A mobile specimen collection station will be set up at Block N of Kornhill to provide free testing services.

The two imported cases are both foreign domestic helpers who arrived from Indonesia.

Meanwhile, the Government announced that the list of medium or high-risk areas in the Mainland has been updated in view of the latest epidemic development in some areas in Anhui Province and Liaoning Province.

With effect from today, inbound travellers who have been to Anhui Province in the past 14 days do not fulfil the relevant specified conditions under the Return2hk Scheme and they are required to undergo 14 days of compulsory quarantine upon arrival and relevant mandatory testing.

Shortening of compulsory quarantine period for fully vaccinated people will also not be applicable.

The same arrangement will be applied to inbound travellers who have been to Liaoning Province in the past 14 days from tomorrow.

For information and health advice on COVID-19, visit the Government's dedicated webpage.