Israel is arming local militias in Gaza in an effort to counter Hamas in the besieged enclave, officials say, as opposition politicians warned that the move endangers national security.

Israeli Prime Minister Benjamin Netanyahu has confirmed that Israel is arming clans in Gaza that he says are opposed to Hamas. His comments came after Israeli media reports quoted defence sources as saying Netanyahu had authorised giving weapons to one particular group in the south of Gaza.

The Israeli prime minister's comments on social media were the first public acknowledgment of Israel’s backing of armed Palestinian groups within Gaza, based around powerful families.