A German is stabbed to death as officials say tourists are targeted in a knife and hammer attack.
Civilians in parts of north and south Gaza have been told to evacuate as Israel’s renewed bombardment continues.
The UN says renewed war between Israel and Hamas is “catastrophic” and a “nightmare”.
If Israel kills as many in south Gaza as the north, Biden will have to decide whether he can keep giving Israel as much support.
The top diplomat delivers the strongest US remarks yet in Israel on protecting Palestinian civilians.
Palestinians tell the BBC they were beaten and had dogs set on them while in Israeli detention.
The boys, aged eight and 14, were shot by Israeli troops in Jenin, Palestinian officials say.
President Nixon’s foreign affairs guru declared power to be the “ultimate aphrodisiac”.