TEL AVIV, Israel (AP) — Israeli soldiers battled Hamas fighters in the streets of Israel’s south on Sunday and exchanged strikes with Lebanon’s Hezbollah militant group in the north, while Israel’s retaliation strikes leveled buildings in Gaza. The prospect of Hezbollah joining the fighting a day after an unprecedented surprise attack from Gaza raised the chances of a broader conflict. Hamas fighters, backed by a volley of thousands of rockets, broke through Israeli barricades early Saturday to rampage through nearby Israeli communities. They took captives back into the coastal enclave, including women, children and the elderly, while Israel's retaliation strikes...