JERUSALEM—The Israeli military on Friday said it fired interceptor missiles and protectively scrambled warplanes after what it described as a drone launched from Lebanon crossed its tense northern border. Hours later, investigations concluded the drone managed to return to Lebanon, the Israeli military said in a statement, stopping short of blaming Lebanon’s Hezbollah terrorist group on launching the drone. In Lebanon, Hezbollah issued a statement saying it had sent the “Hassan” drone inside Israel. It claimed the drone toured the targeted area for 40 minutes on a “reconnaissance mission that extended along seventy kilometers” inside the occupied territories. “Despite the enemy’s multiple and successive attempts to shoot it down, the ‘Hassan’ plane returned from the occupied territories safely after it successfully carried out the required mission,” it said. Minutes after the Hezbollah announcement, Israeli fighter jet flying at very low altitude buzzed the Lebanese capital Beirut, jolting residents, rattling windows, …