The C.I.A. director, William J. Burns, revealed that negotiations for a cease-fire and the release of Israeli hostages have hit a roadblock due to Hamas rejecting the latest proposal from Israel, Qatar, and Egypt. The proposal included allowing some Gazans to return to the northern part of the enclave, a key demand of Hamas. However, Hamas has not accepted the proposal, leading to a lack of progress in talks. The Israeli intelligence service expressed regret over Hamas's rejection, while Hamas argued that there were not enough living civilian hostages who met Israel's criteria. The Biden administration also expressed its desire for Israel not to escalate its conflict with Iran, following a failed Iranian attack. Despite the challenges, Mr. Burns emphasized the quality of the Israeli military and the support of the United States.