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Russia has confirmed its use of a thermobaric weapon system, or “vacuum” bombs, during Putin’s invasion of Ukraine, the UK Ministry of Defense said Wednesday.
Vacuum bombs disperse explosive material over a large area that uses surrounding oxygen as fuel when it detonates, creating a blast wave that lasts far longer than conventional explosives.
“The impact of the [TOS-1A] is devastating,” the UK Ministry of Defense said in a video. “It can destroy infrastructure and cause significant damage to internal organs and flash burns, resulting in death to those exposed.”
House Speaker Nancy Pelosi, D-Calif., said that she discussed Russia’s use of vacuum bombs with Ukrainian President Volodymyr Zelenskyy on Wednesday.
“We talked about weapons that Putin is using, weapons prohibited in the Geneva Conventions, including cluster bombs and vacuum bombs, which caused severe suffering,” Pelosi told reporters.
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Pentagon Press Secretary John Kirby, meanwhile, said Wednesday afternoon that he has seen “no indications” that Russia has used thermobaric weapons in Ukraine.
Oksana Markarova, Ukraine’s ambassador to the United States, originally told reporters on Feb. 28 after meeting with Congress that Russian forces used a vacuum bomb.
“They should pay, they should pay a heavy price,” she said at the time.
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U.S. Ambassador to the United Nations, Linda Thomas-Greenfield, said on March 2 that Russia has moved vacuum bombs into Ukraine, accusing Putin of increasing “the brutality of its campaign against” the country.
“We have seen videos of Russian forces moving exceptionally lethal weaponry into Ukraine,” she said in remarks at the UN. “That includes cluster munitions and vacuum bombs – which are banned under the Geneva Convention.”
Human Rights Watch explains that vacuum bombs are “prone to indiscriminate use” due to their large blast radius.
“In urban settings it is very difficult to limit the effect of enhanced blast weapons to combatants, and the nature of enhanced blast weapons makes it virtually impossible for civilians to take shelter from their destructive effect,” the organization said.
Vacuum bombs, or fuel-air explosives, were developed by the United States in the 1960s for use in Vietnam, according to the Center for Arms Control and Non-Proliferation.
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Russia used vacuum bombs in Chechnya in the 1990s and more recently during the Syrian civil war.
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White House Press Secretary Jen Psaki said last week that if Russia is using vacuum bombs, “it would potentially be a war crime.”
International Criminal Court Prosecutor Karim Khan is investigating potential war crimes by Russia in Ukraine from 2013 to the ongoing invasion of Ukraine.