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 is suspending its role as a mediator in talks between Israel and Hamas after concluding that the two sides are no longer negotiating in good faith, its foreign ministry said Saturday.