The Chinese capital began mass testing people in one of its 16 districts where most of the new cases have been found.
Some residents worked from home and many stocked up on food as a safeguard against the possibility that they could be confined indoors, as has happened in multiple cities, including the financial hub of Shanghai.
Beijing residents snapped up rice, noodles, vegetables and other food items as long lines formed in supermarkets and store workers hastily restocked some empty shelves.
One woman, carrying two bags of vegetables, eggs and frozen dumplings, said she was buying a little more than usual.
The city has ordered mass testing across sprawling Chaoyang district, where 46 of the cases have been found.
“Based on the previous response made by my community, if there’s any emergency, I think supply can be guaranteed.
Shanghai has buckled under a strict lockdown that has driven residents to band together to get food delivered through group buying.
Beijing locked down residents in an area about 2 by 3 kilometers , telling them to work from home and stay in their residential compounds.