BEIRUT/UNITED NATIONS/JAKARTA - Two United Nations peacekeepers were killed and two others wounded, one seriously, when an explosion destroyed their vehicle near the town of Bani Hayyan in southern Lebanon on Monday, UNIFIL said in a statement.

The blast is the second deadly incident involving UNIFIL personnel in 24 hours. A peacekeeper from the mission's Indonesian contingent was killed earlier when a projectile struck the unit's headquarters.

UNIFIL said it has launched an investigation into the vehicle explosion. UN peacekeeping chief Jean-Pierre Lacroix told reporters that the two soldiers killed near Bani Hayyan were also Indonesian.

The mission called on all parties to respect international law, warning that deliberate attacks on peacekeepers violate humanitarian law and UN Security Council Resolution 1701, and could constitute war crimes. "The human cost of this conflict is far too high. The violence must end," the statement said.

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Lacroix said the UN remains seriously concerned about incidents of aggressive behavior against UNIFIL peacekeepers in the past couple of days.

"All acts that endanger the peacekeepers must stop. All actors must adhere to their obligations to ensure the safety and security of the peacekeepers at all times," Lacroix told a daily briefing.

Indonesian authorities confirmed that two more Indonesian personnel serving in UNIFIL were confirmed dead on Monday evening, bringing the total number of Indonesian peacekeepers killed in the country to three.

"In the incident, two military soldiers were reported dead, while two other soldiers were seriously injured. The soldiers who are currently injured have received medical treatment at a health facility in Beirut," said Brigadier General Rico Ricardo Sirait, head of Indonesia's Ministry of Defense's Information Bureau in Jakarta.

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Cross-border fighting has escalated along the Lebanon-Israel frontier since March 2, when Hezbollah fired rockets at Israel for the first time since a ceasefire took effect on Nov 27, 2024, prompting intensified Israeli airstrikes across southern and eastern Lebanon.

Meanwhile, four soldiers were killed and two others injured in combat in southern Lebanon, the Israeli military said on Tuesday.