The two local cases are residents of Oi Fai House at Yau Oi Estate in Tuen Mun, where six people who live there had recently come down with the disease.
Health officials said one of the new cases, a 71-year-old man, started showing symptoms on April 7, while a 63-year-old woman was asymptomatic.
Authorities had on Friday ordered residents living in units 09 on all floors to evacuated, after experts suspected vertical transmission along the pipes.
The next day, officials further ordered residents of units 10, 31 and 32 to go into quarantine after more cases were confirmed.
The 11 imported cases recorded on Sunday involved people arriving from Pakistan, India, Bangladesh and Indonesia.
Meanwhile, authorities are investigating the death of a man who died 23 days after receiving a Sinovac coronavirus shot.
The 58-year-old government contractor fell unconscious while working at a Drainage Services Department control centre last Thursday.
First responders said his heart had stopped and he was declared dead in hospital on the same night.
He did not report any discomfort after the inoculation.
The expert panel on post-vaccination medical incidents will now look into whether the death has anything to do with the vaccine.
______________________________
Last updated: 2021-04-11 HKT 16:40