Several small explosions have hit outside a provincial headquarters of the ruling Communist Party in northern China.
The officials Xinhua news agency said one person had been killed and eight injured in the blasts on November 6 in Taiyuan in Shanxi Province.
The official Xinhua News Agency quoted an eyewitness as saying smoke and flames were seen pouring from a minivan.
Xinhua said its own reporter saw steel ball bearings scattered around the scene of the blast.
The incident comes a week after three people drove through crowds to Tiananmen Gate in the center of Beijing before setting their vehicle alight.
The attack killed five people and has been blamed on Muslim extremist separatists from the restive Xinjiang region.
Based on reporting by AP and Reuters