The camp is part of a protest campaign aimed at forcing the resignation of Lebanon's government.
The demonstrators have vowed to continue the protest until the government of Prime Minister Fuad Siniora steps down.
Siniora, who has pledged not to be forced out of office by the protests, has received the backing of Western governments.
Iranians demonstrating in support of Hizballah in Tehran on July 17 (epa)
'FOR THE SAKE OF LEBANON': The Islamic Republic of Iran has served as an ideological inspiration for Hizballah since the Lebanese militant group's creation in 1982, and Tehran acknowledges that it supports the organization morally and politically. "Yes, we are friends of Syria and Iran" Hizballah leader Hassan Nasrallah has said. "For 24 years we benefited from our friendship with Syria and Iran for the sake of Lebanon...." (more)