The Chinese authorities have put an entire city into lockdown after the discovery of just three asymptomatic Covid cases.

Residents have been told hey cannot leave their homes in Yuzhou, which has a population of 1.2 million.

The transport system has been shut down as well as well as shops and entertainment venues. Only food stores can remain open and only workers involved in epidemic prevention are allowed out.

Clive Myrie presents BBC News at Ten reporting by China correspondent Robin Brant.

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