The toll from the strike in the Nabatieh area included “a woman and her two children” and left five other people wounded, two critically, Lebanon’s health ministry said in a statement.
Israel’s military, on its Telegram channel, said the air force had struck a weapons storage facility of Lebanon’s Hezbollah movement overnight “in the area of Nabatieh”, which is about 12 kilometres (seven miles) from the nearest point of the Israeli border.
Iran-backed Hezbollah and Israeli forces have exchanged near-daily fire over their border since war in the Gaza Strip began last October between Palestinian Hamas militants and Israeli forces.
The latest incident comes alongside fears of a wider regional war, which international mediators have been trying to avert through talks on a truce in Gaza.
