JUBA, Sudan — Former US president Jimmy Carter, who is in Sudan monitoring the country's landmark elections, said on Monday there was little doubt that the three days of polling will have to be extended.

"I don't think there is much doubt that there will have to be an extension on the time for voting," Carter told reporters after meeting south Sudan leader Salva Kiir on the second day of polling.

Sudanese are voting for president as well for legislative and local representatives in the first competitive vote in 24 years. Southerners are also voting for the leader of the semi-autonomous government of south Sudan.

"There were some serious problems with the election process in some voting places where lists have been very difficult to find your names, where voters have difficulty finding their names," said Carter, who visited around 20 polling stations in south Sudan on Monday.

"In some cases, wrong ballots were sent to other places in southern Sudan."

Asked about whether the results of the vote, which began amid some chaos on Sunday, would be legitimate, Carter said: "It depends on whether or not the mistakes are corrected."

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