ISRAELI tanks battered areas around two hospitals in Gaza's main southern city Khan Younis on Thursday, forcing displaced people into a new desperate scramble for safety, residents said, in an escalating offensive Israel says is targeting Hamas militants. In Gaza City in the north of the embattled enclave, 20 Palestinians were killed and 150 injured when were hit by an Israeli strike while queuing to collect food aid, said Ashraf al-Qidra, spokesperson for Gaza's Hamas-run health ministry. The Israeli military said it was looking into the report. Gaza health officials said at least 50 Palestinians had been killed in the…