Two other peacekeepers were also injured in the incident and are receiving medical treatment at a UNIFIL facility.
The force said an investigation is underway “to determine the exact circumstances that led to this tragic incident… The violence must end.”
It is unclear where the bombing originated, but the development comes amid intensified exchanges of fire between the Israeli army in southern Lebanon and Hezbollah fighters who are not part of the Lebanese army.
“Deliberate attacks against peacekeepers are serious violations of international humanitarian law and Security Council Resolution 1701, and may constitute war crimes,” UNIFIL stressed.
The attack came hours before the United States announced a ceasefire renewal agreement between Lebanon and Israel on Wednesday.
Higher price
Serbian authorities have confirmed that the soldier was a Serbian national who had received urgent medical care after his base was attacked. He was then airlifted to a Beirut hospital, where he died.
“We express our deepest condolences to the family, friends and colleagues of the soldier who lost his life in the service of peace,” UNIFIL said in a statement. “Our thoughts are also with the full and speedy recovery of the injured peacekeepers.”
In its announcement, UNIFIL highlighted “a growing number of trajectories and impacts” across southern Lebanon.
Violence erupted on March 2, when Hezbollah fighters fired into northern Israel, shortly after Israeli-US bombing raids on Iran began in late February.
The latest truce agreement that does not include Hezbollah reportedly involves the creation of “pilot zones” where the Lebanese army will take control.
To date, violence has uprooted more than a million people in Lebanon and left communities living in fear.
The United Nations Children’s Fund (UNICEF) has described how families in southern Beirut have been too afraid to stay in their homes for fear of attack.
“Most of them come during the day, check their homes and leave at night,” said UNICEF spokesman Christophe Boulierac. UN News.
On Monday, videos showed thousands of vehicles queuing to leave the capital’s southern suburbs, following warnings of imminent Israeli attacks on Hezbollah strongholds.
“In Beruit alone, an estimated 200,000 people were displaced from the southern suburbs following the evacuation order issued by the Israel Defense Forces on June 1,” UN spokesman Stéphane Dujarric said in an update on Wednesday.