Israeli strikes across Gaza killed at least 19 Palestinians overnight, including several children, as US Secretary of State Antony Blinken headed to the region on Sunday to try to seal a ceasefire deal after months of contentious negotiations. The US and fellow mediators Egypt and Qatar appeared to be closing in on a deal after two days of talks in Doha, with American and Israeli officials expressing cautious optimism. But Hamas has signalled dissatisfaction to what it says are new demands by Israel, and the long-running talks have repeatedly stalled. The latest Israeli bombardment included a …