Secretary of State Marco Rubio said the Israeli Knesset's move towards the annexation of the West Bank could threaten the Trump-backed Gaza ceasefire. Rubio made the comments ahead of his trip to Israel to help oversee the fragile truce between Hamas and Israel.

Several top U.S. officials are in Israel to shore up the Gaza ceasefire and attempt to bring about a permanent end to the war. They acknowledge the next phase poses serious challenges.

Israel said it carried out air strikes on Gaza Oct. 19 after its troops were attacked, sending the ceasefire into uncertainty.

The U.S. and Israel are considering a plan that would divide Gaza into separate zones controlled by Israel and Hamas, with reconstruction only taking place on the Israeli side.

Israel has accused Hamas of attacking Israeli forces in southern Gaza with the military carrying out airstrikes in the city of Rafah, the first major test of the US-brokered ceasefire.

An Israeli security official said the transfer of aid into the territory is halted "until further notice," the first major test of the ceasefire.

Vance also cautioned that “there is currently no existing security infrastructure to guarantee Hamas’s disarmament. ” The ceasefire between Israel and Hamas is not in danger of collapsing, US President Donald Trump told reporters on Monday,