Four IEC employees and two police were wounded, he said.
IEC officials said 4,500 observers will monitor the election process in Kandahar and 6,000 staff have been hired in Kandahar for the election process. Major roads were closed almost 24 hours before polls opened to prevent auto bombs.
But long queues of voters had formed as early as 07: 00 local time (02h30 GMT), the polls opened two hours late.
More than 2,500 candidates nationwide are running for 250 seats in the Wolesi Jirga, the lower house of the Afghan parliament, including more than 400 women. "They can not find people's names on the voters list".
On October 20, Afghanistan held its much-delayed parliamentary elections, the provisional results of which will be announced on November 10 and final ones on December 20.
However, the Independent Election Commission (IEC) promised to open polling centers at 7am as scheduled and to resolve problems with voter lists and the biometric system. They are also high for the US, which is still seeking an exit strategy after 17 years of war that has cost more than $900 billion and claimed the lives of more than 2,400 USA service personnel.
Jamal Khashoggi’s killing was a premeditated crime, Saudi prosecutors say
British Prime Minister Theresa May said its Saudi arms sales were "under review", a stance similar to that expressed by Australia. It has emerged that Mr Khashoggi's son has left Saudi Arabia and is on his way to the United States .
The suicide bomber was shot by the security forces but that could not prevent him from detonating, said Mujahid.
Underscoring Afghanistan's precarious security situation, a suicide attack outside a military compound in Afghanistan's central Wardak province south of the Afghan capital, Kabul, killed six people, provincial council member Sharifullah Hottak said. Another eight people were wounded, he said, although the casualty numbers could rise.
The ballot was also marred by lengthy delays at polling stations and allegations of fraud.
Islamic State claimed responsibility on Monday for a blast near the election commission in Afghan capital Kabul, according to a statement on the group's Amaq news agency.
Streets in the city were quieter than usual at the beginning of the Afghan working week, after authorities restricted the use of cars and motorbikes during voting hours.