Health officials on Monday said no Covid-19 cases had been found after they conducted three lockdowns in Tuen Mun, Tai Kok Tsui and Tai Po.
The operations, prompted by three preliminary positive cases, took place at Tower 8 of Aegean Coast on Castle Peak Road, Tower 2 of Harbour Green on Shum Mong Road and Mei Sun Building on Kau Hui Chik Street.
About 1,550 residents were tested.