Iran has warned the United States that it would respond forcefully to an Israeli offensive on a mountainous ridge in southern Lebanon where Iranian military personnel are holed up alongside Hezbollah fighters, three officials briefed on the message told Reuters.
The message, delivered last month, highlights Iran's continued direct involvement in the ground fighting in southern Lebanon and its readiness to retaliate against Israeli attacks there as the regional war enters its seventh month.
Hezbollah is believed to have built an underground command center and weapons stores within the Ali al-Taher ridge, which has a commanding view of southeastern Lebanon, according to Lebanese security sources, and has become one of the most contested pieces of ground in the Israel-Hezbollah war.
Hezbollah has said in public statements that it controls the hill and will confront any Israeli advances. Its officials have referred to a "facility" there, but have declined to provide details.
The Israeli military has occupied swathes of territory to Ali al-Taher's south and has identified the ridge as one of its "primary operational focuses" in public statements.
In its message to Washington, Tehran threatened that any full-fledged Israeli offensive on the ridge would be met with a large-scale Iranian attack, said the three officials in the region, who spoke to Reuters on condition of anonymity.
The IDF failed several times to conquer the ridge, losing dozens of tanks and armoured vehicles and a few KIA to Hezbollah drones and IEDs.