"The secretary general of Hezbollah, Hassan Nasrallah, will make an appearance on Sunday at 8:30 pm (1830 GMT) on Al-Manar television to comment on the latest developments," the network said.

Hariri's government collapsed on Wednesday after the powerful Iranian-backed Hezbollah and its allies resigned from the cabinet in a dispute over a UN-backed probe into the 2005 murder of his father, ex-premier Rafiq Hariri.