Hong Kong (CNN) A prominent Chinese official has promoted a conspiracy theory that the United States military could have brought the novel coronavirus to China -- and it did not originate in the city of Wuhan, as thought.

Posting to his more than 300,000 followers on Twitter, Foreign Ministry spokesman Zhao Lijian republished a video of Robert Redfield, the director for the US Centers for Disease Control and Prevention, addressing a US Congressional committee on March 11.

In the clip, Redfield said some influenza deaths in the US were later identified as cases of Covid-19, the disease caused by the novel coronavirus

Redfield didn't say when those people had died or over what time period, but Zhao pointed to his remarks in support of a growing conspiracy theory that the coronavirus did not originate in Hubei province in central China. He did not offer any further evidence for the claim.

2/2 CDC was caught on the spot. When did patient zero begin in US? How many people are infected? What are the names of the hospitals? It might be US army who brought the epidemic to Wuhan. Be transparent! Make public your data! US owe us an explanation! pic.twitter.com/vYNZRFPWo3 — Lijian Zhao 赵立坚 (@zlj517) March 12, 2020

"CDC was caught on the spot. When did patient zero begin in US? How many people are infected? What are the names of the hospitals? It might be US army who brought the epidemic to Wuhan. Be transparent! Make public your data! US owe us an explanation!" the Foreign Ministry official said.