Hamas is seeking guarantees that a new U.S.-backed ceasefire proposal for Gaza would lead to the war's end, a source close to the militant group said on Thursday, as medics said Israeli strikes across the territory had killed scores more people.

New video shows several blasts lighting up the sky over the Gaza Strip early Friday morning. Health officials in Gaza said about half of those killed were women and children, with many waiting for aid.

The rise of Izz al-Din al-Haddad in the chain of command suggests the group will hold firm to its position demanding a total end to the war before releasing all remaining hostages.