A man has been arrested for allegedly killing four people, including his wife and son, over a family dispute in northwest China's Gansu Province, local police said Thursday.

Following a dispute with his wife, the suspect, Zhang Xiaojun, killed his son, father-in-law and nephew at his father-in-law's home in a village in the city of Jiuquan at about 12:50 a.m. Tuesday, according to police.

Zhang, 37, also injured his wife, mother-in-law and sister-in-law, and his wife later died due to severe injuries.

The suspect then fled the scene.

Police arrested him on Wednesday in a nearby township.

Zhang, a native of Xuzhou, Jiangsu Province, lived with his family in a village in Suzhou District, Jiuquan.

A police investigation is under way.

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