A club of former Lebanese prime ministers said on Sunday they endorsed the choice of another former premier, Najib Mekati, to form a new government in yet another attempt to bring Lebanon's political deadlock to an end.

Among Mikati's endorsers was veteran politician Saad al-Hariri, who abandoned his effort to form a new government last week after nearly 10 months of failing to agree its makeup with President Michel Aoun.

Aoun is due to meet parliamentary blocs on Monday for consultations on nominating a new prime minister.

Lebanon has been run by a caretaker administration for nearly a year, while its currency has collapsed, jobs have vanished and banks have frozen accounts. The economic freefall is Lebanon's worst crisis since the 1975-90 civil war.