Ukraine claims that Russia is using vacuum bomb
It is also known as thermobaric weapon or aerosol bomb
Vacuum bomb uses the effects of temperature and pressure on the target
It sucks in oxygen from the surrounding air to generate a high-temperature explosion
1st stage munition: distributes aerosols
2nd stage: ignites that cloud creating a shock wave sucking up the oxygen and making a vacuum around its target.
Blast wave of a vacuum bomb lasts significantly longer than traditional explosives.