The U.S. intelligence community says Ukraine does not have a program to develop weapons of mass destruction and pushed back against Russian claims that the United States is running bioweapons labs in Ukraine, calling them part of a Kremlin disinformation campaign.

The Russian government and media outlets have ramped up claims in recent days that the U.S. operates bioweapons research facilities in Ukraine, with Chinese diplomats and propaganda outlets amplifying the story. The U.S. and Ukraine have consistently denied the claims, and Russia has never provided any proof, despite pushing the claims against Ukraine and other former Soviet states for many years.