An elderly man who returned a positive test for Covid-19 in Hong Kong died on Tuesday, the city's Hospital Authority said, the city's first death potentially linked with the virus in five months as it struggles with a worsening outbreak.

The 73-year-old patient was chronically ill and had preliminarily tested positive for Covid-19 during hospital admission screening, according to a statement from the Authority late on Tuesday.

It was unclear whether his death would be...