The Ukrainian armed forces may have used chemical weapons against their Russian counterparts in the Kharkov direction, pro-Russian media reported on Sunday after a video surfaced showing one of Moscow's soldiers seemingly choking after he inhaled toxic chemicals.

Reportedly, the Russian infantrymen were hit by Ukrainian drones carrying chemical weapons components that exploded outside of where they were positioned.

🇺🇦🧪🏴‍☠️🇷🇺Potential use of chemical weapons by the AFU in Kharkov direction

It looks the infantry was hit from AFU drone carrying chemical weapons component that exploded outside... pic.twitter.com/HPAEdyFSwx

— AZ 🛰🌏🌍🌎 (@AZgeopolitics) March 5, 2023

Kiev's forces in Soledar were bragging in early January about using chemical weapons by assembling UAVs and attaching projectile cans to them. 

At the time, it was thought that the chemical weapons at hand were hydrogen cyanide capsules, as they were stored in the freezer in a video that was shared at the time.

The gas is dispersed over a large area when the shell on the copter breaks apart, leading to the imminent death of those who inhale the chemicals.

The gas in question, also known as hydrocyanic acid, saw combat for the first time during WWI before it was utilized by the Nazis in concentration camps in the 1930s.

This comes after Russia revealed in late January that Moscow started months into the war compiling data pertaining to the role and functions of US Biolabs in Ukraine based on the documents they secured.

Initially, Washington refused to admit the existence of US Biolabs in Ukraine, however, later in time undersecretary of state Victoria Nuland did.

According to Russian Radiological, Chemical, and Biological Defense Troops Chief Igor Kirillov, "Russian troops have secured over 20,000 documents, reference, and analytical materials, and interviewed eyewitnesses and participants in American military-biological programs," since the start of the Ukraine war.

Furthermore, Kirillov confirmed that the documents, which remain under review and in the process of being deciphered, without any doubt reinforced the existing analysis, which argued that the Pentagon had intended to test biological weapons on the populations of the Eastern European country and its neighbors, Russia included.

There have been warnings since the start of the war, notably from Russian Deputy Foreign Minister Oleg Syromolotov, that Moscow considered the threat of chemical terrorism by Ukrainian nationalists and the military to be very real.

"We consider very real the threat of chemical terrorism by fascist nationalists, operating under the patronage of the current Kiev regime, and units of the Armed Forces of Ukraine under their control," Syromolotov said.

Furthermore, Kirillov said late last year that the US was planning on transferring its programs of biological research from Ukraine to post-Soviet republics, as well as Eastern European and Baltic states.

The Russian official underlined that Washington was working on putting its plans into high gear at the soonest time possible, noting that this would allow the US to develop and store components of biological weapons, which pose a threat to the security of Russia.

Russia and the United States have been undergoing major tensions for months, with Moscow accusing Washington of having biological laboratories in Ukraine and the latter denying it. Eventually, the US confirmed that it did have what Under Secretary for Political Affairs Victoria Nuland referred to as "biological research facilities".

Nuland refused to cooperate with the Russian parliamentary commission on the operations of US biological laboratories in Ukraine, Deputy Speaker of Russia's Federation Council Konstantin Kosachev said late last month.

Moscow had discovered new information proving the Pentagon's involvement in developing components for biological weapons in Ukraine.

Data on biological laboratories found in Ukraine does not help the case of the US against claims regarding its compliance with the Biological and Toxin Weapons Convention (BTWC), Russian foreign ministry spokesperson Maria Zakharova had said.

Additionally, Moscow found that US President Joe Biden's son, Hunter Biden, helped finance military research into dangerous pathogens at Biolabs in Ukraine is true, according to new emails from his infamous laptop.

Moscow also exhibited documents confirming the organization of military-biological work by the Pentagon represented by the US Department of Defense Threat Reduction Department.