Interior Minister Ahmad al-Hajjar said 26 people were arrested after protesters attacked a convoy transporting U.N. peacekeepers to Beirut airport on Friday, injuring a top commander.

Ahmad Hajjar, speaking after a security meeting on Saturday, condemned the attacks and said the investigation is ongoing, with detainees being questioned to release the innocent and prosecute those responsible.

President Joseph Aoun has vowed to punish the perpetrators of an attack on a United Nations peacekeeping convoy, with authorities set to hold an emergency meeting on Saturday.

The U.N. and Lebanese authorities have condemned Friday's attack, which came as Hezbollah supporters for a second night blocked the road to the country's only international airport over a decision barring two Iranian planes from landing there.

Lebanese authorities are set to hold an emergency meeting on Saturday after a deputy commander with the U.N. peacekeeping force in the country was injured during an attack on a convoy taking him to the airport.

Hezbollah supporters have been blocking the road to the country's only airport for two consecutive nights over a decision barring two Iranian planes from landing in Beirut.

Hezbollah and its ally the Amal Movement appeared to be scrambling to distance themselves from Friday's attack on UNIFIL vehicles near Beirut's airport.

Hezbollah's Al-Manar TV said in a statement posted on its social media accounts that “unruly elements caused chaos with suspicious objectives on the Beirut airport road.”

The United Nations Interim Force in Lebanon on Friday demanded a "full and immediate investigation by Lebanese authorities" Friday after one of its vehicles was torched by Hezbollah supporters on the airport road, wounding its outgoing deputy commander.

"Attacks on peacekeepers are flagrant violations of international law and may amount to war crimes," the UNIFIL peacekeeping force said.

A vehicle emblazoned with the logo of the U.N. peacekeeping force in Lebanon was torched late Friday as supporters of Hezbollah again blocked the road to Beirut airport.

The charred vehicle lay abandoned by the roadside as Lebanese troops deployed in response to the protest and managed to reopen the road and restore order in the area.

Iran accused Israel on Friday of disrupting flights from Tehran to Beirut, after a decision barring two Iranian planes from landing in the Lebanese capital sparked protests.

Israel has repeatedly accused Hezbollah of using Lebanon's only airport to transfer weapons from Iran and struck the area during its war with the Tehran-backed militant group which ended late last year.

The U.S. representative on a committee overseeing the ceasefire agreement that ended the latest Israel-Hezbollah war said Friday that “significant progress” had been made ahead of a looming deadline to implement all the terms of the deal.

However, Maj. Gen. Jasper Jeffers' statement appeared to leave some ambiguity on whether Israel would withdraw its forces from all of southern Lebanon by the ceasefire's Feb. 18 deadline, saying only that he was confident “all population centers in the Southern Litani Area” would be back under Lebanese control by then.

In a speech to a crowd of supporters at his father's tomb on Friday, ex-PM Saad Hariri stopped short of announcing a return to politics, but did say his al-Mustaqbal Movement would "stay with you and be your voice in all national milestones and in all upcoming events."

Thousands of supporters gathered in downtown Beirut Friday to commemorate the 20th anniversary of former Prime Minister Rafik Hariri's assassination, which comes amid seismic regional political shifts.

The ousting of Bashar Assad in December after 54 years of family rule in Syria marked the fall of a government long accused of orchestrating Hariri's assassination and other political killings in Lebanon.