In a post on X, the Polish embassy in Lebanon condemned the attacks and called for the ceasefire to be respected.
"We pay tribute to the French and Indonesian soldiers who fell while carrying out their missions," the statement read.
On Saturday, a mortar shell landed near a Polish military convoy travelling between bases in southern Lebanon.
No soldiers were injured, though three vehicles sustained minor damage.
Convoy operations have since been temporarily suspended while additional precautions are in place.
The same day, French Staff Sgt. Florian Montorio of the 17th Parachute Engineer Regiment from Montauban was killed in an attack on UNIFIL forces – a death confirmed by President Emmanuel Macron.
The incidents come despite a 10-day ceasefire between Israel and Hezbollah that was agreed on April 16.
Israel's military said it had struck Hezbollah fighters who approached its forces, insisting the operation did not violate the truce.
Three Indonesian peacekeepers were also killed in separate incidents in late March.
Preliminary UN findings suggest one died after being struck by fire from an Israeli tank, while the other two were killed in an explosion likely caused by Hezbollah.
The UN said its investigation remains ongoing.
UNIFIL has been deployed in southern Lebanon since 1978, monitoring the Blue Line separating the country and Israel.
Around 10,000 troops from various nations currently serve in the mission, which is due to conclude at the end of 2026.
At present, Poland has 140 soldiers in the force, operating in the southeastern part of the Western Sector.
(ał)
Source: PAP