Hong Kong health officials have uncovered a new nightclub Covid-19 cluster they fear may already have spread to a school, while authorities are looking into making arrivals take an additional coronavirus test to prevent more infections entering the community.

With the emergence of 11 nightclub-linked cases and previously known clusters worsening, the city recorded 270 new Covid-19 cases on Saturday. But a government pandemic adviser said the possibility of a rebound in local infections remained low.

Thirty-one of the 270 cases were imported and one more virus-related death was recorded. The latest figures took the overall Covid-19 tally to 1,211,858 cases, with 9,376 related deaths.