"UNIFIL is seriously concerned by numerous strikes on the Lebanese Armed Forces (LAF) inside the Lebanese territories," the peacekeepers said in a statement, using the acronym for the United Nations Interim Force in Lebanon.

The army has reported 19 members killed while on active duty.

The army's "role remains vital for the full implementation of Resolution 1701 (2006), which is essential to ending the ongoing violence between Hezbollah and Israel," UNIFIL said.

Resolution 1701 ended the last Hezbollah-Israel war of 2006 and stated that Lebanese troops and UN peacekeepers should be the only armed forces in the country's south.

It also called for Israel to withdraw troops from Lebanon and form the basis for ongoing ceasefire talks.

UNIFIL, currently with more than 9,300 troops, has been stationed in southern Lebanon since 1978 and is tasked with monitoring the "Blue Line" of demarcation with Israel.

"We remain deeply alarmed by the escalation of hostilities and the widespread destruction and loss of life across the Blue Line," the peacekeepers said, urging parties "to address their differences through negotiations — not through violence."

On Sunday, the Israeli military expressed "regret" for an incident in which a Lebanese army position was hit.

The Lebanese army reported one soldier killed in the incident and 18 others wounded.

Israeli forces had previously targeted UNIFIL forces and buildings in southern Lebanon. 

In early November, UN peacekeepers on Friday said the Israeli army damaged one of their south Lebanon positions in a "deliberate and direct" action against their forces.

The incident, which occurred on 8 November, is like "seven other similar incidents" carried out by the Israeli army, UNIFIL said in a statement.

It "is not a matter of peacekeepers getting caught in the crossfire but deliberate and direct actions by the Israeli army,” it added.

Tensions between Israel and UNIFIL had initially risen in October after reports of Israeli forces firing on UNIFIL forces. 

UN peacekeepers in Lebanon said Israeli fire on their headquarters in the south on 10 October left two Blue Helmets injured, as they accused Israel of "repeatedly" hitting their positions.

Italy and Ireland, which have troops on the mission, called the shooting unacceptable.

Later, a confidential report obtained by the Financial Times revealed that Israeli forces have launched at least a dozen documented targeted attacks on UN peacekeepers in southern Lebanon, including the use of white phosphorus near UN bases, injuring 15 soldiers and significantly damaging the UN infrastructure.

The report, prepared by a country contributing troops to the mission and reported by the FT on 23 October, outlines detailed incidents where Israeli forces targeted the UN peacekeeping forces (UNIFIL) in southern Lebanon since launching its ground invasion on 1 October. 

By 31 October, UNIFIL said it had recorded over 30 incidents, which damaged UN property or premises or injured peacekeepers.

Israel's attacks on Lebanon have caused significant civilian casualties, killing 3,768 and injuring another 15,699, as per the latest numbers released by the Lebanese public health ministry.