Beijing (CNN) Eight people are dead after a hijacked bus drove into pedestrians in the southeastern Chinese city of Longyan in Fujian province, authorities said Tuesday.

Police detained a 48-year-old knife-wielding man, surnamed Qiu, at the scene. Authorities are investigating the incident, the Longyan City government office said.

Twenty-two others were injured in the attack, which took place at 3.20 p.m. local time Tuesday, with one person left in critical condition.

Authorities said the perpetrator "took revenge on society" after a dispute with local officials about his father's veteran benefits.

According to Chinese state-run CCTV, on the day of the attack some officials from the local residents' committee went to Qiu's house and an argument ensued.

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