A report on Chinese social media site Weibo stated that officials confirmed the case Saturday after the Haidian District Center for Disease Control and Prevention received notice from a third-party testing company.
The district launched an "emergency response," which involved testing of personnel in "relevant areas" for review by the Beijing CDC. People living with the individual tested negative but some environmental samples in the home tested positive.
Health authorities have imposed control on 17 sites related to the case, the South China Morning Post reported.
"Now Beijing’s epidemic prevention and control work faces the double risk of overseas and domestic cases," said Pang Xinghuo, deputy director of the Beijing Municipal CDC, referring to the Olympic athletes and delegations accompanying them. Another official urged all departments to "ensure the safety of the capital, the Winter Olympics and its residents."
The case stands as the first confirmed omicron infection in Beijing, but China has battled a number of outbreaks over the past two months around the country due to the variant.
More than 20 million people across China have lived in some form of lockdown over the past two weeks ahead of the Olympics in an attempt to keep the games on track, including forced quarantine in vast "camps" where people isolate en masse.
The city of Xi’an has become the epicenter of China’s omicron pandemic, but the city lies some 680 miles away from the capital. Residents in Xi’an initially had enough freedom to buy food, but officials tightened up restrictions further in the past two weeks.
But officials had tied infections to the city of Tianjin which sits around 75 miles away from Beijing, prompting concern that it was only a matter of time before the capital and Olympics host city saw its first case.
Officials in Dalian closed the building where the infected individual lives, and also closed buildings where anyone they had close contact with lives, Reuters reported.
China’s current difficulties may seem breezy ahead of Chinese New Year, set to start Feb. 1, when most of the citizens move around the country and gather with family.