The Israeli military said Monday that four soldiers were killed in southern Lebanon, the first deaths announced in the area since the start of a cease-fire nearly two weeks ago.

The four reservists, all from the same battalion, "fell in combat" on Sunday.

The Israeli army radio reported that their death was due to an "operational accident."

The Israeli army announced that they died in southern Lebanon when a building collapsed after an explosive device was detonated on Sunday, Haaretz reported, adding that the army is investigating whether the building was booby-trapped by a different Israeli army unit before the four entered it.

Israel and Hezbollah agreed to a cease-fire after nearly a year of war.

As part of the deal, Israeli troops are expected to pull out of southern Lebanon in a 60-day period while the Lebanese Army deploys to the area.

Under the agreement, based on a U.N. Security Council resolution that ended the last Israel-Hezbollah war, peacekeepers and the Lebanese army should be the only armed groups in the south.

The deaths bring to 56 the number of Israeli soldiers killed in southern Lebanon since the military launched a ground offensive in late September.

Israeli Prime Minister Benjamin Netanyahu said in a statement that he shared his "deepest condolences" with the families of the soldiers.

The Israeli military has continued to strike what it claims to be Hezbollah targets since the start of the cease-fire, saying it is acting against breaches of the agreement.

An Israeli drone strike targeted a car on the Saf al-Hawa road in Bint Jbeil, southern Lebanon, on Monday, killing one person and injuring four others, including Lebanese soldiers. The attack occurred near a Lebanese Army checkpoint in the town.

"The Israeli enemy targeted a car near the army checkpoint at Saf el-Hawa in Bint Jbeil, killing one civilian and moderately wounding four soldiers," the Lebanese Army said in a statement on X.

On Sunday it said its ground troops had "located and dismantled ready-to-use weapons" stored in a civilian area and several tunnels.

Hezbollah began launching low-intensity strikes at Israel in October last year, in support of its Palestinian ally Hamas.

The cross-border fire escalated into all-out war when Israel shifted its focus from Gaza to Lebanon, in a bid to secure its northern border.