The U.S. secretary of state, visiting Israel, said the killing of Hamas’s leader last week could create an opening for peace, and he pushed the Israeli prime minister to allow more aid into Gaza.

The top U.S. diplomat’s visit to the region came as humanitarian conditions rapidly deteriorated in the Palestinian enclave.

US Secretary of State Antony Blinken on Tuesday urged top Israeli officials to “capitalize” on the killing of Hamas leader Yahya Sinwar’s death in order to secure the release of the remaining hostages held in Gaza and bring the war there to a close – but there is little evidence that either of those aims are within close reach.