"The suicide bomber blew himself up next to a auto of an IEC [Independent Election Commission] staff member that was parked near a police checkpoint", said an election body official.
The attack came as Afghan officials were beginning to count ballots from its long-delayed parliamentary elections held over the past two weeks under tight security.
On the first day of the elections, 15 people were killed in a suicide attack in the capital Kabul.
"Most of the complaints are against the voter's registration lists, the second complaints were against the observers - that some observers were encouraging people to vote for their favorite candidates - but the main challenge was the late opening of the stations and the lack of materials", said Karimullah Stanikzai head of IECC regional office.
On October 21, when elections were held in polling stations that could not open on the main polling day, 11 people died in an explosion.
Polls closed at 5pm local time but election officials could not immediately determine the turnout from the 567,000 registered voters in Kandahar.
On Saturday voters in Kandahar - the southern birthplace of the Taliban and a province notorious for ballot stuffing - went to the polls. "We want to vote and will do so even at the risk of our lives", has insured with the AFP Samiullah, an elector of the city of Kandahar.
The voting in Kandahar Province was initially postponed a week and rescheduled for October 27 in the southern Afghan province after a high-profile attack by Taliban militants.
IEC figures suggest around half of the almost nine million people registered to vote actually cast a ballot.
Raziq was among three people killed in a brazen insider attack on a high-level security meeting in Kandahar city that was attended by General Scott Miller, the top United States and North Atlantic Treaty Organisation commander in Afghanistan.
The attack took place after a meeting with the top USA commander in Afghanistan, General Scott Miller.
Voting in parliamentary elections has been completed in 33 of the country's 34 provinces.
Preliminary nationwide results are expected to be released in November.