More than 13,000 residents of the Nanxinyuan residential complex in the southeast of the capital, although tested negative for the virus, were transported overnight to isolation hotels and threatened with reprisals if they resisted.
"Experts have decided that all Nanxinyuan residents will be quarantined from midnight on May 21 for seven days," read an announcement from Chaoyang district health authorities.
"Please cooperate or you will face legal consequences," they added.
Photos on social showed hundreds of people queuing with their luggage in the dark to board coaches outside the residence.
"Some of us have been locked up for 28 days since April 23, and we've all tested negative since then," one resident complained on Weibo.
"Many of my neighbors are elderly or have young children."
Residents were asked to pack their clothes and essentials, and told their homes were going to be sanitized, according to discussions on Weibo.
Pékin est confrontée à sa plus forte flambée de contaminations depuis le début de la pandémie. Le variant Omicron a infecté plus de 1.300 personnes depuis fin avril, entraînant la fermeture indéfinie des restaurants, des écoles et des sites touristiques.
China is pursuing a draconian "zero Covid" policy: border closures, massive tests, confinement of entire cities and forced quarantines for contact cases.
Last month, thousands of Shanghai residents were sent to makeshift quarantine centers hundreds of miles away as the metropolis of 25 million battled an outbreak.
On Weibo, Internet users expressed concern on Saturday that Beijing was adopting an approach similar to that of Shanghai, where residents have been suffering for weeks from a confinement that has deprived many people of adequate access to food and care.
"It's exactly the same as in Shanghai, the first step is to turn off the water and electricity, then demand keys...then disinfect the houses. Electrical appliances, wooden furniture , clothes, food...they're all ruined," read one comment that had more than 300 likes.
© 2022 AFP