Unconfirmed footage reportedly out of Yemen shows the impact area of Saudi TOS-1 Thermobaric "Heavy Flamethrower System" multiple rocket launcher carrying out a fire mission against Iranian-backed Houthi rebels.

Thermobaric warheads, also known as fuel-air bombs, vacuum bombs, or aerosol bombs, operate by combusting the oxygen around the target, resulting in a massive fiery explosion. Even if the shrapnel or shockwave doesn't kill the intended targets, it is rumored that the combustion of all oxygen in the immediate area will collapse the lungs of those protected by cover, resulting in casualties.