According to the NGO Yesh Din, settlers have attacked Palestinians in more than 100 incidents in at least 62 towns and villages in the West Bank under cover of the war from Oct. 7-22.
Israel sent troops into Gaza on Friday night and has pledged to continue doing so to target tunnels and other infrastructure used by Hamas.
The substance is not banned as a chemical weapon, but it is prohibited by the Convention on the Prohibition of Use of Certain Conventional Weapons, to which Israel is not a signatory.
Gallant said that the Jewish people had not endured anything like this since the Holocaust.
Storm-Z is an unofficial term used by Russian troops, combining a term for assault troops with the letter Z, adopted by the military as a symbol of their invasion of Ukraine.
Washington has long provided Egypt with large amounts of military and other aid, ever since the Arab world's most populous nation signed a peace deal with neighboring Israel in 1979.