Israel said its forces had returned to northern Gaza to fight a Hamas resurgence. That has brought a new round of suffering for residents.

Israeli strikes killed dozens of people on Sunday in Lebanon and the northern Gaza Strip, where the military has been waging a major offensive for more than a month that aid groups say has further worsened the humanitarian crisis in the besieged enclave.

Qatar has suspended its role as a key mediator for a Gaza ceasefire and hostage release deal until Hamas and Israel show "seriousness" in talks, the foreign ministry said Saturday.