Israel's military said on Sunday anti-tank missiles from Lebanon targeted an army base and vehicles and that it responded with fire into southern Lebanon, according to a report by Reuters.
Lebanon's Iran-backed Hezbollah group said its fighters destroyed an Israeli military vehicle, killing or wounding those inside. In a brief statement, an Israeli military spokesman stated there were no casualties from the attack.
Israel has been on alert for a possible confrontation with Hezbollah for the past week after drones attacked what security officials in the region described as a target in a Beirut suburb linked to precision-guided missile projects.
Hezbollah's leader said late on Saturday its field commanders were ready to respond to the drone attack, which he blamed on Israel.
Amid the Hezbollah threats, Israel had moved reinforcements into the border area, which had been largely quiet since both long-time enemies fought a month-long war in 2006.
In a statement, the Israeli military said several anti-tank missiles were fired from Lebanon on Sunday and "a number of hits were confirmed".
Following the missile fire, Israelis living near the Israel-Lebanon border were instructed by authorities to stay indoors.
Earlier on Sunday, Lebanese military said an Israeli drone had dropped incendiary material and sparked a fire in a pine forest by the border.
Without claiming responsibility for the drone attack last week, the Israeli military published what it said were details about an extensive Iranian-sponsored campaign to provide Hezbollah with the means to produce precision-guided missiles.
Such missiles – which Hezbollah acknowledges possessing – could potentially pose a counter-balance to Israel's overwhelming military force in any future war, with the capacity to home in on and knock out core infrastructure sites.