A Lebanese armored vehicle stops in central Beirut Nov. 30, 2006. Security tightened in the city after the announcement of a mass demonstration against Lebanese Prime Minister Fouad Siniora called by the opposition led by the pro-Syrian Hezbollah.(Xinhua Photo) Photo Gallery >>>

    Meanwhile, anti-Syrian Interior Minister Hassan Sabaa said that security authorities were ready to confront any attempt to undermine foundation of security, stressing that protestors should obey laws and regulations.

    Lebanese Shiite group Hezbollah and pro-Syrian allies have earlier mobilized for mass street protests to topple incumbent government led by Seniora following the cabinet's Nov. 13 approval of a UN draft document for the creation of an international tribunal on former Prime Minister Rafik Hariri's killing.

    Six pro-Syrian ministers resigned earlier this month after the country's leaders failed to reach an agreement on formation of a national unity government.

    In the wake of the resignation, the pro-Syrian bloc said that Seniora's government had lost its legitimacy since Shiite Muslims are no longer represented.

    The anti-Syrian parliamentary majority, however, has accused Hezbollah and Amal movement, the main pro-Syrian and pro-Iranian Shiite groups, of doing Damascus' and Tehran's bidding and seeking to undermine formation of the tribunal.