Zambian police fired tear gas to disperse supporters of the leading opposition candidate, as the presidential election was extended into a third day.
Opposition candidate Hakainde Hichilema said some remote parts of the country had not received ballot papers halfway through the polling day.
Two cases involving a suspected gay couple and a gay rights activist have returned to Zambian courts, raising concerns over growing homophobia.
A decision by Zambia's president to slash a key food subsidy threatens to hit the poor, stoke inflation and spark a revolt against his government.
Chipolopolo have returned home to an ecstatic welcome from thousands of fans who gathered to greet the Africa Cup of Nations's winning team.
Zambia's new president Michael Sata has taken a strong stance on corruption, vowing to prosecute anyone found guilty of embezzlement.
Stone-throwing mobs smashed cars and blocked roads during voting in Lusaka after the opposition accused President Banda's party of rigging the ballot.
The US has urged AU countries to take advantage of a trade act which grants well-governed African states preferential access to the US economy.
Zimbabwe's Prime Minister Morgan Tsvangirai will ask a regional security summit on Thursday to stop what he says is a crackdown by Robert Mugabe.
African leaders on Thursday will try to defuse escalating tensions in Zimbabwe, where President Robert Mugabe is accused of cracking down on rivals.