HONG KONG — Hong Kong leader Carrie Lam says the territory is ramping up coronavirus testing, especially for workers at the busy international airport and caregivers at homes for the elderly and disabled.

Lam said Tuesday tests would be increased from 4,500 to 7,000 daily with both the government health department and university laboratories taking part. Hong Kong has gone several days without new local infections, but a recent cluster among three members of the same family has increased concerns about those who show no symptoms passing the virus on to others, something authorities hope can be remedied with increased testing.

A densely populated city of more than 7 million people just across the border from mainland China, Hong Kong has reported 1,055 COVID-19 cases and four deaths.