TEHRAN, Young Journalists Club (YJC) - "It complicates the peace process even more (between Israel and the Palestinians) and creates a new challenge to regional security," AFP quoted Hariri as saying at the Lebanon International Support Group meeting in Paris on Friday.
"In the name of the Lebanese people, I can only repeat our rejection of this decision,” he added.
Hariri’s remarks come as protests are underway across Palestinian territories and around the world against Washington’s decision with regard to Jerusalem al-Quds.
US President Donald Trump on Wednesday defied global warnings and said the US formally recognizes Jerusalem al-Quds as the “capital” of Israel, and will begin the process of moving its embassy to the occupied city, breaking with decades of American policy.
Washington’s al-Qud move has raised a chorus of outcry across the international community. The Muslim world, the United Nations and even US allies in the West have criticized the bid, saying it would plunge the already tumultuous region into new upheaval.
Palestinian leaders have declared Friday as the “day of rage” against Israel and the US.
Clashes broke out between Israeli police and Palestinian protesters after Friday prayers in Jerusalem al-Qud's Old City, Hebron, Bethlehem and the Nablus area in the West Bank as well as Gaza Strip.
Israeli forces fired rubber bullets and tear gas at the Palestinian protesters, injuring nearly 40 people.
The UN Security Council is set to hold an urgent meeting on Washington’s announcement later in the day.
Late on Wednesday, Deputy Palestinian UN envoy Feda Abdelhady-Nasser said in a letter to the UN Security Council that Trump’s move violates numerous resolutions that prohibit changes to the status of Jerusalem al-Quds.
The entire Jerusalem al-Quds is currently under Israel’s control, while the regime also claims the city’s eastern part, which hosts the third holiest Muslim site.
The city has been designated as “occupied” under international law since the 1967 Arab War, which Palestinians want as the capital of their future state.
Trump had vowed during his presidential campaign that he would relocate the US embassy in order to court pro-Israel voters.
Palestinians have repeatedly warned Trump against such an action, saying it would deliver a death blow to any prospects of the resolution of the Palestinian-Israeli conflict and fuel extremism in the region.