I mean, the answer is loads. There was a hospital where they had to move all patients away from the outer rooms because the Israeli army were using snipers to pick off staff who came to attend to them. Uniformed doctors who were engaged in treating their patients were shot with no warning.
Israel-Gaza war live: Israeli hostages mistakenly killed by IDF in Gaza were holding makeshift white flag, official says (www.theguardian.com)