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The head of the radiation, chemical, and biological defense troops of the Russian armed forces, Lt. Gen. Igor Kirillov, said on Saturday that Russia is worried about US-controlled tests of infectious agents on military personnel and mental patients in Ukraine. 

"Of particular concern are tests, controlled by the US Defense Department, of infectious agents and toxic substances on Ukrainian soldiers and the mentally ill, who are one of the most vulnerable categories of citizens," Kirillov told a press briefing.

The official further raised concerns over the fact that the investigation on the US biological military program failed to be launched at the UN Security Council as the probe into US operations in Ukraine did not gather enough votes on November 3.

Since the start of the conflict, Russia found out that the Pentagon was carrying out military biological programs at several locations in Ukraine.

Read more: Russia releases documents on US-funded bio-weapons, Hunter Biden exposed

The Pentagon has itself admitted on June 10 that the US government supported 46 biological research facilities in Ukraine for the past 20 years.

But it defended its position on the basis that its activities were "in support" of the Biological Weapons Convention.

On September 19, the Russian Ministry of Defense presented evidence in Geneva proving that the US has military-biological activity in Ukraine.

A conference of the Biological Weapons Convention was held in Geneva between September 5-9 in response to the US and Ukrainian violations of Articles I and IV of the Convention on the Prohibition of the Development, Production, and Stockpiling of Bacteriological and Toxin Weapons and on their Destruction (BTWC).

Evidence revealed that the Pentagon was controlling several facilities near the Russian border, where biological weapons were being developed.

Read more: China: UN's 'full attention' needed for US bioweapons in Ukraine