UNIFIL claims to have opened an investigation into the incident and increased its presence at the border alongside the Lebanese army.
A Lebanese man was shot dead by Israeli troops after he and others demonstrating in support of the Palestinians tried to cross a security fence on the border with Israel, the Lebanese state news agency NNA reported.
ANI said another person was injured on Friday after protesters gathered along the border in solidarity with the Palestinians as Israel continued to bombard the besieged Gaza Strip.
The Lebanese government hospital in Marjayoun told Al Jazeera that Mohammad Tahhan, 21, died of his injuries. The condition of the second protester was not immediately known.
Earlier, the IDF said a number of people in Lebanon damaged the border fence and set a field on fire. They withdrew after Israeli tanks fired warning shots.
Lebanese protesters had gathered near the fence, waving flags, including the Palestinian national flag and the flag of the Lebanese movement of Hezbollah backed by Iran, a fierce opponent of Israel.
Lebanese President Michel Aoun said in a statement that he “strongly condemns the crime committed by Israeli forces”.
The protesters were then dispersed by the Lebanese army in the presence of UNIFIL, the United Nations peacekeeping force in Lebanon that monitors the border with Israel, a witness said.
UNIFIL spokesperson Andrea Teneti said in a statement that they had opened an investigation into the incident and had increased their presence at the border alongside the Lebanese army.
“We are aware of reports that a Lebanese civilian was killed along the Blue Line near Kafer Kila today during a clash with the IDF,” the statement said. “Any loss of life is tragic and we urge everyone to remain calm and to avoid making the situation worse and risking more lives.”
Three rockets were fired from southern Lebanon near the Rashidiyeh Palestinian refugee camp into Israel on Thursday, a Lebanese military source said. The IDF said the rockets landed in the sea.
A source close to Hezbollah said the Lebanese Shiite group had no connection with the incident.
Additional reporting by Kareem Chehayeb in Beirut.