At least 50 Palestinians were killed in Israeli attacks in the Gaza Strip, according to the Gaza health authority, which is controlled by Palestinian Islamist group Hamas. Earlier, the WAFA Palestinian news agency reported at least 11 civilian deaths and an unspecified number of people injured in the southern city of Khan Yunis and in the Nuseirat area in central Gaza. The reports come as efforts for a ceasefire continue in Cairo, with Hamas sending a delegation to take part in mediated talks. Israel has been waging war on Hamas since October, and the Israeli army on Saturday reported ongoing …