China's Macao Special Administrative Region (SAR) will launch mass COVID-19 testing starting Saturday at 3:00 p.m., the SAR announced on Saturday, in the wake of the detection of new cases. 

The mass testing will be offered free and run for four days.

A total of 52 testing sites are available for Macao residents and people staying in the city. 

Macao had logged 66 confirmed cases as of early Saturday.