An Israeli air strike on Monday killed Hezbollah fighter Amer Jamil Dagher, also known as Abbas, and his sister in south Lebanon, the National News Agency (NNA) and the movement said. Later, Hezbollah said it fired rockets at northern Israel in response. Israel’s military said it had targeted an arms depot and a military installation belonging to the powerful Iran-backed group. “The Israeli enemy committed a massacre of civilians in the town of Bint Jbeil, with one brother and a sister in the Dagher family killed,” the NNA reported. It said another sister was gravely wounded when Israeli aircr…