The United States Geological Survey meanwhile reported a 4.1 magnitude tremor in the area, after Lebanon's state-run National News Agency (NNA) reported that Israel carried out a "massive explosion" on the Ali al-Taher ridge in the Nabatieh region, "causing tremors and a powerful rumble".
AFP journalists in south Lebanon also said they heard "huge explosions" on Thursday evening.
"We were sitting there and everything shook," Joelle Fares, who recently moved to Majayoun, told AFP.
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The underground compound also included a command centre of Hezbollah's "Badr" unit, the army added. A
Israel announced last week that it had captured the Ali al-Taher ridge. In March, Hezbollah dragged Lebanon into the and the United States in June, followed by an agreement between Lebanon and Israel. But strikes have increased in intensity in recent days. During negotiations, the United States, which sponsored the talks, proposed that the Lebanese army take control of the Ali al-Taher ridge, but Hezbollah refused, a source close to the parties told AFP.
