But Izzat El-Reshiq, a member of the political office of Hamas, accused Israel of trying to derail efforts by Arab mediators and the United States to reach a ceasefire deal by stepping up its attacks in the enclave.

Saturday's strike in the Khan Younis area of Gaza, in which at least 90 Palestinians were killed, according to local health authorities, has put the ceasefire talks in doubt.

There had been increasingly hopeful signs in recent days that a deal could be reached to halt fighting and return hostages held in Gaza.

Two Egyptian security sources at ceasefire talks in Doha and Cairo said on Saturday that negotiations had been halted after three days of intense talks.