Mr Pompeo responded: “We don’t know. But, people talk about this as if we don’t know very much.
“We actually know an awful lot. We know there was gain-of-function research, that this lab was Level 4 and had security leaks before.
“We know there were doctors who became ill and were hospitalised in the fall of 2019. What was the Chinese Communist Party’s intention?”
He continued: “We know there was military activity taking place at the same laboratory.
“We don’t what they were doing but we do know that they don’t want you to know.
“That suggests we should give them no benefit of the doubt. They could clear this all up in a minute if they wanted to.
“When we get to the end of this, we will have demonstrated that the Chinese knew what had happened and their virology lab was at the centre of it.”
This comes as Matt Pottinger, the former deputy national security adviser under Donald Trump, discussed how the Wuhan virus lab were experimenting on viruses “96 percent similar to the virus now making us all sick”.
Also in his Fox News interview, Mr Pompeo accused the National Institutes of Health of trying to suppress his department’s investigation into the true origins of the coronavirus pandemic.
He said: “NIH folks were trying to suppress what we were doing at the State Department as well.”
Earlier this week, former MI6 chief Sir Richard Dearlove said that it would now be difficult to prove the lab leak theory now.
He said that evidence of any lab leak that could be the origin of the Covid pandemic will have been destroyed by Chinese officials.