(AGI) Jerusalem, July 20 - The IDF has announced that at least13 Israeli soldiers were killed in the Gaza Strip on Sunday,marking the worst single-day death toll for the IDF sinceoperation Protective Edge began. Earlier, Hamas militantsambushed an Israeli armoured vehicle, while other militiamenclaimed they attacked Israeli troops in a house in Gaza. Thesoldiers who were killed all belonged to the Golani Brigade,deployed in Israel's land operations. . .