The Times of London has provided photographic evidence that the Israeli military is using white phosphorus in its war in Gaza.
"The Times has identified stockpiles of white phosphorus (WP) shells from high-resolution images taken of Israel Defence Forces (IDF) artillery units on the Israeli-Gaza border this week. The pale blue 155mm rounds are clearly marked with the designation M825A1, an American-made WP munition. The shell is an improved version with a more limited dispersion of the phosphorus, which ignites on contact with oxygen, and is being used by the Israeli gunners to create a smoke screen on the ground."
White phosphorus rounds are used to create a smoke cover for advancing troops, but their use in civilian areas is controversial.