The Chinese Ambassador to the United States, Cui Tiankai. did not deny that the coronavirus came from China’s biological warfare program on Sunday and instead suggested that the deadly virus could have come from a military lab in the U.S.

Tiankai made the remarks on CBS News’ “Face The Nation” in response to China’s struggle to stop the coronavirus from continuing to spread. It has now infected at least 37,198 and killed at least 811 in China.

“This week, Senator Tom Cotton, who sits on the Senate Intelligence and Armed Services Committee, suggested that the virus may have come from China’s biological warfare program,” CBS News’ Margaret Brennan said. “That’s an extraordinary charge. How do you respond to that?”

“I think it’s true that a lot is still unknown and our scientists, Chinese scientists, American scientists, scientists of other countries are doing their best to learn more about the virus…