In a video, Gabbard said the "undeniable facts" are that 35 to 40 "U.S. funded bio labs" in Ukraine are conducting research into dangerous pathogens.
Gabbard went on to express concerns that these "deadly pathogens" could be released if the labs in Ukraine are targeted amid the conflict with Russia.
Gabbard has also recently appeared on Tucker Carlson's Fox News show to discuss claims of Ukraine developing bio weapons, clips of which were played on Russian state television.
Others also accused Gabbard of appearing to be working on behalf of Russia by helping them spread conspiracy theories about U.S.-funded bio labs in Ukraine.
Comrade Tulsi Gabbard's latest video proves Hillary Clinton's claim to Tulsi being a Russian asset.".
Screenwriter and Forbes contributor Mark Hughes wrote: "Tulsi Gabbard is a traitor & a Russian agent who belongs in military prison.".
Read more QAnon Embraces Russia Conspiracy Theories on Ukraine Labs QAnon Embraces Russia Conspiracy Theories on Ukraine Labs. »