Around 300 others were found positive in preliminary tests, TVB said, citing an unnamed source.
The global financial hub, which is following mainland China's strategy of suppressing all coronavirus outbreaks as soon as possible, has seen cases soar since January with over 2000 infections compared with just two in December.
The city recorded 342 cases on Sunday, slightly below the previous day's record of 351 cases.Â
The city is expected to report a record of around 610 cases on Monday.
Dozens of bank branches including outlets of HSBC and Bank of China said they would suspend operations from Monday to help curb transmissions.
Health Secretary Sophia Chan said over the weekend she expects cases to rise "exponentially".
The former British colony has become one of the most isolated cities in the world, with flights down around 90 per cent due to strict coronavirus regulations and schools, playgrounds, gyms as well as most other venues shut.
Restaurants close at 6pm, while most people, including the majority of civil servants, are working from home.
The economic and psychological tolls from the hardline approach are rapidly rising, with measures becoming more draconian than those first implemented in 2020.
Government quarantine facilities are also nearing their maximum as authorities struggle to keep up with their rigid contact tracing scheme.
Authorities hold daily briefings providing details on each infected person including where they went and ate. As cases surge however, methods including scouring credit card statements and transport records to identify close contacts are far tougher. There are likely hundreds of transmission chains in the community, they said.
In total, Hong Kong has recorded 213 COVID deaths and around 15,000 cases since early 2020, far less than other similar major cities.
Health experts said the city's current strategy of shutting itself off as the rest of the world shifts to living with coronavirus, is not sustainable.
Around 80 per cent of the city's 7.5 million residents have had at least one COVID-19 jab but the majority of elderly remain unvaccinated, government figures show.
Out of these around 40 per cent have received the Chinese-made Sinovac vaccine, believed to be far less effective against the disease than the one produced by Germany's BioNTech , the other vacine available in the city.
Two pet cats tested positive for coronavirus, the government said on Friday, as it urged pet owners to avoid kissing animals. In January, authorities ordered a cull of more than 2000 hamsters in dozens of pet shops, after tracing an outbreak to a worker in a shop where 11 hamsters tested positive.
