Protesters waving Lebanese flags rallied in cities and towns in their thousands on Sunday to mark a month of protests against the ruling elite as politicians struggled to form a government and solve the biggest economic crisis since the 1975-90 civil war.

Lebanon's political troubles deepened further after the withdrawal of a top candidate for prime minister narrowed the chances of creating a government needed to enact urgent reforms.

Mohammad Safadi, a former finance minister, withdrew his candidacy late on Saturday, saying it was too hard to form a "harmonious" government with broad support.