NANNING - A man has been detained in South China's Guangxi Zhuang autonomous region after posting a message on a social networking website that he was going to blow up a Bentley car owned by a local businessman, police said Saturday.

Police in the city of Liuzhou traced the post, which was on Tencent Weibo, to an Internet cafe and arrested a man surnamed Jiang on Tuesday. He has been in police custody for five days.

Jiang said he did not know the car owner and had no plan to commit the crime.

He told police that he made the threat because the car owner drove too "aggressively."