Hamas has signalled support for a new US-backed ceasefire proposal, even as Israeli air strikes destroyed more high-rise buildings in Gaza City, killing at least 65 Palestinians in one day. US President Donald Trump said the proposal, developed last week with special envoy Steve Witkoff, would involve the release of all 48 Israeli captives in exchange for 2,500 to 3,000 Palestinian prisoners and an indefinite ceasefire. Trump claimed Israel had accepted the deal and warned Hamas that this was...