An explosion in southeastern Afghanistan has killed five Afghan civilians, including an election worker.
A spokesman for the joint U.N. - Afghan electoral commission says the blast hit one of its vehicles in Paktika province near the border with Pakistan.
It is unclear what caused the blast.
Meanwhile, interim President Hamid Karzai Monday widened his lead, as more votes were counted from the country's first direct presidential election.
Officials say Mr. Karzai has captured more than 62 percent of the votes counted so far, while former Education Minister Yunus Qanuni got less than 18 percent.
Final results are not expected until later this month. A United Nations panel of election experts is investigating complaints about multiple voting and other irregularities.
Information for this report is provided by AP and AFP.