The large gathering came after a Lebanese man was shot and killed by Israeli troops on Friday after he and others protesting in support of Palestinians tried to cross a security fence on the border, Lebanon’s state news agency NNA reported.
NNA said another person was wounded on Friday after protesters gathered along the border in a show of solidarity with Palestinians as Israel continued a relentless bombardment of the besieged Gaza Strip.
The Israeli army used live fire again on Saturday afternoon, but there were no initial reports of casualties.
Protests have escalated on the border after Israeli soldiers killed a Lebanese man and injured at least three others who were protesting at the border on Friday.
The men were demonstrating against Israel's assault on the Gaza Strip when they were hit, Lebanon's National News Agency said.
The man was identified by Lebanese media as Mohamad Tahan, 21.
The incident occurred after a number of "young demonstrators tried to enter the border town of Metulla" in northern Israel, the agency said.
Videos obtained by Tasnim on Saturday show another group of unarmed protesters at the border region, as they are carrying flags of Palestine, Iran and Lebanon's Hezbollah.