White phosphorus bombs are prohibited for use in civilian areas. They set buildings on fire and cause very severe burns that can burn a person alive.
There have been rumors lately that the IDF uses such bombs in the Gaza offensive. The IDF denies. The UN already wants to investigate the matter.
The “phosphorous front” got (literally) heated up this evening when a Hamas rocket containing phosphorous exploded in the Israeli desert. If this shell had fallen inside an urban landscape, it could have caused severe consequences.
Look at this photo taken by Reuters. Whether or not these are phosphoric explosions in the background, the whole scene looks Sci-Fi.