BEIRUT — Israel’s air force targeted sites belonging to Hezbollah in Lebanon, including in the country’s eastern Bekaa Valley, late on Monday as Israeli Prime Minister Benjamin Netanyahu vowed to intensify attacks on the Lebanese militant group. Netanyahu’s warning came as Hezbollah has been firing fiber optic drones — a weapon used widely in the war in Ukraine — at Israeli forces in southern Lebanon and northern Israel in recent weeks. “We will hit them. It’s true that they are shooting drones