This comes after a 24-year-old assistant producer with the public broadcaster was confirmed to be infected with Covid-19 on Saturday.
During a press conference on Friday, the Centre for Health Protection said the infected staff, who lives in Sheung Shui, had dropped by the dressing room at Television House to pick up some costumes.
However, officials say he had not been in close contact with the hair stylist who also came down with the virus recently.
RTHK, for its part, said a mobile testing centre has been set up at the car park of Broadcasting House to make it easier for staff and visitors to undergo tests.
Meanwhile, mandatory testing orders have also been issued for several other buildings across Hong Kong amid reports of new infections.
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Last updated: 2021-02-20 HKT 22:03