Kabul, Afghanistan (CNN) -- An explosion Tuesday morning killed six people, including a top official of the eastern Afghan province of Ghazni, officials said.
The blast killed the Ghazni province's deputy governor, his brother, his son, his driver and two civilian bystanders. Eight people, including bodyguards, were wounded, the governor's spokesman Ismail Jihangir said.
Mohammad Kazem Allahyar, the deputy governor, was on the way to work when a blast hit his vehicle, Jihangir said.
It was not clear whether the explosion, which occurred in Ghazni City around 8 a.m. (11:30 p.m. ET Monday), was the result of a suicide bombing or a roadside bomb.
Earlier this month, an Afghan parliamentary candidate and another Afghan civilian were wounded in a grenade attack at the governor's compound in Ghazni City, the International Security Assistance Force reported.