The six were among seven new imported cases on Sunday.
The seventh case involved a man, 68, who tested positive for the L452R mutant strain while in quarantine upon his return to the SAR on Wednesday from a visit to the UK – the day he developed symptoms such as coughing and a sore throat.
Residents of Sunrise in Discovery Bay, where he lives, are required to get tested because the patient was there during the incubation period.
People living at 208 Shek O Village were also put under a mandatory test order, as a re-positive case was found living there after her quarantine period ended on Wednesday.
The 29-year-old’s specimen collected on Friday tested positive again after she was infected in Portugal earlier this month.
The fully-vaccinated woman, who was found to be carrying the L452R mutant strain, had not shown any symptoms since returning to Hong Kong on August 19.