BEIJING: The Wuhan Marathon, which had been due to take place Sunday, has been postponed at short notice as worries increase over a coronavirus resurgence in China ahead of the 2022 Beijing Winter Olympics. China reported 26 new domestic Covid-19 cases on Sunday, in an outbreak that has become the latest test of the country's zero-tolerance approach with just over 100 days until the start of the Games.

Authorities have been racing to contain virus infections via mass testing of residents and targeted lockdowns. But with the rise in cases, organisers of the Wuhan Marathon said in a statement released late last week that they would postpone Sunday's event in the central Chinese city "to prevent the risk of epidemic spread".

The marathon was expected to have 26,000 participants taking part in races including full and half marathons in the city where coronavirus was first identified towards the end of 2019.

Next weekend's 40th edition of the Beijing marathon could also be delayed, local media outlet Beijing Daily reported Sunday. Organisers did not immediately respond when contacted by AFP.

As China wrestles with its latest coronavirus spike, authorities on Sunday announced the suspension of cross-provincial tour groups in five areas where cases have been detected, including Beijing.

"The risk that the outbreak spreads further is still increasing," warned National Health Commission spokesperson Mi Feng. Some cities, including Gansu's provincial capital of Lanzhou, and parts of Inner Mongolia have also suspended bus and taxi services, authorities said.