Police in Kinshasa, the capital of the Democratic Republic of Congo, have fired tear gas at opposition protesters who accuse the electoral commission of fraud.

The demonstrators accuse President Joseph Kabila's party of rigging polls in his favour by allowing for the multiple registrations of voters ahead of elections in November.

The country's electoral commission has admitted that there were 20,000 duplicate registrations on a voter list of some 32 million people.

Fears over delays and spiralling costs for the poll are also mounting as much of the election equipment is still abroad and international backers, who played a prominent role in elections in 2006, are taking less interest in this year's poll.

Al Jazeera's Hazem Sika reports from Kinshasa.