Lebanon's Hezbollah movement said an Israeli air strike on Sunday killed two fighters from the Iran-backed group, with the health ministry reporting another death from an attack days ago.
Hezbollah has traded near-daily fire with Israel ever since war in Gaza broke out on October 7 last year.
A strike on Beirut's southern suburbs late last month killed Hezbollah's top military commander, Fuad Shukr, just hours before the assassination, blamed on Israel, of Hamas's political leader Ismail Haniyeh in Tehran.
An "Israeli strike that targeted the village of Taybeh today left two dead," the Lebanese health ministry said in a statement.
Hezbollah confirmed the two were group fighters, killed in Taybeh near the border with Israel.
The official National News Agency reported that "a drone fired two missiles on the village of Taybeh".
A union of local governments in the area said at least three Syrians were killed in an Israeli strike on Derdghaiya.
Separately, the health ministry said a Lebanese civilian succumbed to injuries sustained in an Israeli strike "several days ago" on the southern village of Beit Lif.
Hezbollah claimed several attacks against military positions in northern Israel on Sunday, including at least two using attack drones.
The Iran-backed group said on Saturday it had launched "squadrons of explosive-laden drones" at a north Israel army base following the killing of a Hamas commander in the south Lebanon city of Sidon a day earlier.