GUANGZHOU - A man who set off a small bomb in Beijing airport has taken Dongguan city government to court for alleged failure to certify that injuries to his legs came from beatings by security officers while he worked in the city.

Ji Zhongxing was sentenced to six years in prison earlier this month for setting off a home-made explosive device at Beijing Capital International Airport in July, severely injuring himself and slightly injuring a police officer.

Ji's lawyer Liu Xiaoyuan claims Dongguan city government set up a working group to investigate Ji's claim of beatings by security officers in 2005 which resulted in his paralysis but have failed to disclose their findings.

Ji from East China's Shandong province, is confined to a wheelchair, and went alone to Beijing airport's Terminal 3 arrivals exit on July 20 to set off an improvised explosive device.

Besides suing Dongguan, Ji has also filed against the Guangzhou Provincial Bureau of Public Security.

The Intermediate People's Court of Guangzhou, the provincial capital, ?rejected the suit stating that the bureau "had not violated any rules on government information openness." Ji had applied for information in hope of knowing the "progress of the investigation."