White phosphorus bombs are incendiary weapons that contain white phosphorus, a chemical element that is used in smoke, illumination, and incendiary munitions. White phosphorus is a waxy, translucent substance that ignites on contact with oxygen and burns fiercely, producing a plume of bright white smoke. It is used in military ammunition, including bombs, and is characterized by a loud bang and a plume of bright white smoke. White phosphorus bombs can spread fire over an area up to several hundred square yards and can cause injuries that are more serious and harder to treat than injuries from conventional bombs. White phosphorus is also highly toxic to humans and can cause deep burns, all the way to the bone, and reignite when bandages are removed. It can be absorbed into the body when inhaled, ingested, or through skin contact, and it sticks to many surfaces, including skin and clothing. The use of white phosphorus bombs on civilians is considered a war crime.