BEIJING (AP) – The president of a hospital and the director of the health commission in the northern Chinese city of Qingdao have been fired following the outbreak of China’s latest corona virus, officials said.

Health Commission Director Sui Shenhua and Deng Kai, president of Qingdao’s thoracic hospital, have been implicated in the investigation, Qingdao City Government’s micro-official microblog said Thursday. No other details were provided.

Authorities ordered the city to test 9 million people over the weekend after 12 cases were found over the weekend, including asymptomatic, leading to China’s first local broadcast in about two months.

Similar mass testing campaigns have taken place since the previous explosion. The test started with “close contacts, close contacts of those contacts, more casual contacts” and gradually spread to all the districts of the city.

Qingdao is a major commercial port and industrial center, known for its electronic equipment, the country’s most popular liquor store, and the Chinese navy’s northern shipyard.

China, which discovered the corona virus late last year, has eradicated the virus domestically but is wary of imported cases and a second wave of domestic transmission.

Qingdao reported on Wednesday that it had conducted more than 8 million inspections. Of the approximately 5 million results, no more cases were found.

In the last 24 hours, 11 new cases were reported by the National Health Commission, of which 10 were imported. The other case, listed as asymptomatic, was discovered on September 24 and is classified as a confirmed case.

Hospitals treated 240 people for COVID-19, and 392 were monitored in isolation for positive testing without symptoms or for suspected cases.

China reported 4,634 deaths in 85,622 cases.