Gaza's civil defense said Sunday dozens of bodies had been found buried at a hospital complex previously raided by Israel, as Prime Minister Benjamin Netanyahu vowed to ramp up military pressure on Hamas.

Netanyahu, who threatened action "in the coming days" without elaborating, has repeatedly said Israel will launch a ground assault on Rafah despite international concern for civilians who have taken refuge in the southern Gazan city.

The premier's latest remarks came a day after U.S. lawmakers approved $13 billion in new military aid to close ally Israel, even as global criticism mounts over the dire humanitarian crisis in the besieged Gaza Strip.