A World Health Organisation team due to investigate the origins of COVID-19 in the city of Wuhan has been denied entry to China.
Two members were already en route, with the WHO saying the problem was a lack of visa clearances.
However, China has challenged this, saying details of the visit, including dates, were still being arranged.
The long-awaited investigation was agreed upon by China after many months of negotiations with the WHO.
The virus was first detected in Wuhan in late 2019, with the initial outbreak linked to a market.
[Source: BBC]
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