China has postponed the Beijing marathon until further notice, amid a surge in coronavirus infections.
It comes as the country's top health official warned that a fresh outbreak of cases is expected to spread further.
China has reported more than 133 cases across 11 provinces so far. All of them have been linked to the highly transmissible Delta variant.
The latest surge is considered the largest outbreak in the country since Nanjing in August this year.
It has raised concerns over China's ability to maintain its zero-tolerance approach to the virus, especially leading up to the 2022 Winter Olympics.