Among the 66 locally transmitted cases, 27 were untraceable.
The newly confirmed cases are mainly related to previous cluster outbreaks in the city. Two of the new cases were linked to a large birthday party, one case was linked to an outbreak centered on a clinic and more were recorded in the city's Tsz Wan Shan neighborhood.
Twenty-four of the new cases were transmitted between family members.
Cases are rising sharply in Hong Kong, which recorded more than 170 cases over the last weekend.
Dr. Chuang Shuk-kwan of the Centre for Health Protection said officials needed a few more days to understand the trend in numbers.
“We cannot judge the trend according to one or two days' factors because there's an incubation period. And what we see now refers to what happens in the past one to two weeks,” Chuang said.