16. While thermobaric warheads have reportedly been previously used by Russia in Ukraine on missiles, their use on attack drones would mark an escalation of the warhead's use.Thermobaric warheads create a wave of high pressure and heat that is capable of penetrating thick walls, AP reported. The damage caused by thermobaric attack drones would cause damage that would be "simply terrifying" for civilian populations to endure, including collapsed lungs, crushed eyeballs, and brain damage, according to a source familiar with Russian drone production.While controversial, thermobaric munitions are not prohibited under international law.According to the AP investigation, the thermobaric weapons would be deployed alongside decoy drones meant to overwhelm Ukrainian air defenses. Decoy drones have been regularly used in recent months as Russia has increased its drone attack on Ukrainian cities since the beginning of September.