Lebanese Forces leader Samir Geagea said on Tuesday that Hezbollah revealed its "true face" and is acting according to its own agenda.
He also accused the party of violating the laws and constitution.
Hezbollah has sent fighters to battle alongside the Syrian regime troops against the rebels seeking to topple Syrian President Bachar al-Asad.
On another note, Geagea urged the Lebanese leaders to form the new government to spare the country further tensions.
He also said that the presidential; elections should be held on their due time, adding that they should be free. President Michel Sleiman's term will end in May 2014.