Golden Glory Court, Phase 1 of Golden Lion Garden on Chui Tin Street in Sha Tin was locked down at around 7pm tonight. The exercise is expected to be finished by 6am tomorrow (Friday).

All residents must stay there and undergo compulsory testing before 1am tomorrow. They could be exempted if they had tested negative between Tuesday and today (Thursday), with relevant proof or certificates.

Those who had stayed for more than two hours in the building between September 23 to today must undergo testing by Saturday. Vaccinated persons are required to undergo testing as well.

The lockdown was initiated as health authorities detected a preliminary positive case, involving a 48-year-old cargo handler. He lives at Golden Glory Court and works at SuperTerminal 1 of the airport.

He tested negative on September 29 but the sample he submitted yesterday tested preliminarily positive for the L452R mutant strain.

The man remains asymptomatic and he went to work today as well. He had received two doses of Sinovac vaccine on June 25 and July 28 in Hong Kong.

The Centre for Health Protection is still investigating the source of where he contracted the virus.