Netanyahu's office said Hamas had "reneged on parts of the agreement reached with the mediators and Israel in an effort to extort last-minute concessions."

The deal, mediated by the United States, offered a glimmer of hope in a conflict that has taken an immense human toll.

By Andrew Mills, Nidal al-Mughrabi and Maayan Lubell DOHA/CAIRO/JERUSALEM (Reuters) - Israel intensified strikes on Gaza hours after a ceasefire and hostage release deal was announced, residents and authorities in the Palestinian enclave said,