Lebanon’s Hezbollah has fired a series of drones into Israel, striking several areas and triggering air raid sirens.

Video shared by local media outlets in Israel showed a drone, launched as part of a swarm attack on areas some 20km into Israel, hitting the ground near civilian infrastructure.

Hezbollah has confirmed it carried out an air attack in northern Israel that caused casualties.

In a statement, the Lebanese group said it fired a series of drones at the headquarters of Israel’s Golani Brigade, an infantry brigade, and the headquarters of its Egoz Unit, an elite commando unit, located in the Shraga barracks near the Lebanese border.

The attacks "hit their targets accurately and achieved casualties”, said the group, adding that its response for the killing of Fuad Shukr, a senior military commander, in an Israeli strike on Beirut last week is "yet to come”. The Times of Israel reported that two people have been injured, one critically, in the nearby town of Mazra’a from a drone impact.

Earlier, Israel said it had carried out an air strike against what it said was a "military structure” used by Hezbollah in southern Lebanon.

The Lebanese health ministry said four people were killed in the strike on a house in the town of Maifadoun, around 30km from the Israeli border.

Security sources told the AFP news agency that the four men were Hezbollah fighters. (Agencies)