He claims that all "research centers" were "abandoned and safely deactivated" by the Americans before Russia launched a special operation in Ukraine.
At the same time, Kirby said that the United States does not carry out work on the creation of biological weapons in Ukraine.
“There are no biological weapons, there are no laboratories,” TASS quoted him as saying.
Earlier it became known that the Russian military during the special military operation received more than 20 thousand documents and reference and analytical materials about the American biological program in Ukraine.
The Investigative Committee of Russia announced that it would study the data of the Ministry of Defense on the military-biological activities of other countries on the territory of Ukraine.
In March, US Senior Deputy Secretary of State Victoria Nuland, speaking at a hearing before the US Senate Foreign Affairs Committee, announced Washington's efforts to prevent certain research materials from Ukrainian biological laboratories from "falling into the hands of Russian forces".