Gaza’s civil defence 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, AFP reports.

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 US 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.

Gaza’s civil defence agency said its teams had discovered 50 bodies since Saturday buried in the courtyard of the Nasser Medical Complex in Gaza’s main southern city of Khan Yunis.

“We… are waiting for all graves to be exhumed in order to give a final number of martyrs,” Mahmud Bassal, spokesman for the civil defence agency, told AFP.

“There were no clothes on some bodies, which certainly indicates (the victims) faced torture and abuse,” Bassal said.

Israel’s military said it was checking the reports.

Hamas in a statement said the 50 bodies were exhumed from what it called a “mass grave” in the hospital’s courtyard.

Israel pulled its ground forces from Khan Yunis on April 7 after carrying out what it called a “precise and limited operation” at the hospital, one of Gaza’s biggest.