Saudi Arabia has abandoned its position as mediator in Lebanon, making it less likely that a speedy resolution to the crisis will emerge.
Last week, Hezbollah and other opposition parties withdrew their support from Saad Hariri's coalition government, forcing it to collapse.
Political and sectarian divisions have also resurfaced following the UN draft indictment into the assasination of former prime minister Rafiq al-Hariri, that is widely believed to implicate Hezbollah.
There are fears that this tension may spill onto the streets.
Al Jazeera's Zeina Khodr reports from Beirut.