Russia claims bioweapons labs are being placed in Ukraine by the US since at least 2017. Unfortunately not only do the documents exist, but a video has surfaced hosted by the US Embassy in Kiev discussing the matter.
Quote The rumors that the Russians are striking bio weapons labs is gaining credence. Here is a link to the State Department's list of research labs in Ukraine, which has now been deleted, but are archived:
The Russian military special operation in Ukraine coincided with the planned launch of U.S. military biolaboratories in Kiev and Odessa. On February 26, the US Embassy in Ukraine rushed to delete all documents about 11 Pentagon-funded bio-laboratories in Ukraine from its website. All these documents (now deleted by the Embassy), you can read HERE.
"The time for war has not yet come, but it will come and that soon, and when it does come, my advice is to draw the sword and throw away the scabbard." Gen. T.J. Jackson, March 1861