At least 137 cases have been reported in the past week following 57 days without a locally transmitted case. The Xinfandi food market which supplies 80 percent of meat and vegetables in the city is thought to be the source of the outbreak. As per the BBC, at least 27 neighbourhoods have been placed at medium risk,
Another, close to the market is thought to be at high risk.
People in neighbourhoods in either category are not allowed to leave.
People in low-risk neighbourhoods are able to leave but must first test negative.
However, tests are in demand and three centres say they will not be able to provide any until July.
Railway services will not resume until at least July 7.
Schools, sports, swimming pools and gyms have been suspended.
The Beijing government said “relevant people” from the market will not be allowed to leave irregardless of the neighbourhood they live in.
Though the coronavirus outbreak was first spotted in Wuhan, central China, the curve had appeared to have been flattened before the cases in Beijing emerged.
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“This advice is being kept under constant review.”
Beijing city spokesman Xu Hejian said at a press conference: “The epidemic situation in the capital is extremely severe.
“Right now we have to take strict measures to stop the spread of Covid-19.”
On Tuesday, state media suggested the new virus came from abroad.
Wu Zunyou, chief epidemiologist at the Chinese Centre for Disease Control and Prevention told CGTN: “It clearly indicates the virus strain is different from what it was two months ago.
“The virus strain is the major epidemic strain in European countries.
“So it is from outside China brought to Beijing.”
Authorities claimed more than 76,000 people were tested on Sunday.