In a statement, they said Tower 5A and 5B, Royal Diamond of the Wings II, as well as Ming Tai House at On Tai Estate, will be sealed off overnight, with authorities expecting the operation to complete by midday Friday.
Lai Pak House at Lai Tsui Court will be sealed off until 1pm Friday.
The buildings were locked down after sewage samples were found with traces of Covid-19.
“In the cases in which employees are unable to go to work because of the declaration, the Government hopes their employers can exercise discretion and not deduct the salaries or benefits of the employees,” a statement said.
In addition, anyone who had been present at the buildings for more than two on specific days must undergo compulsory testing in accordance with the orders issued by the government. This will include vaccinated people or those who tested negative recently.