A man in a wheelchair who was airing grievances set off a homemade bomb in a crowded terminal at Beijings main airport on Saturday evening,injuring himself but no one else,Chinese state media and witnesses said. Order was quickly restored and no flights were affected by the explosion at the airports main international terminal,state-run China Central Television (CCTV) said on its microblog. The Xinhua News Agency said a wheel-chaired Chinese man set off the device outside the arrivals exit of Terminal 3 at Beijing Capital International Airport at around 6:24 p.m. It said the man was being treated for injuries,but that no one else was hurt in the explosion. CCTV identified the man in the wheelchair as Ji Zhongxing,born in 1979 and from the eastern province of Shandong. It was not immediately clear why the man allegedly set off the bomb,but Xinhua said he was stopped from handing out leaflets airing his complaints before setting off the bomb. Xinhua,which cited an initial police investigation,did not say what his complaints were. In an online blog entry from 2006,a writer who provides the same name,the same year of birth and the same hometown in Shandong province as Ji complained of his disabilities resulting from cruel beatings by security personnel in the southern province of Guangdong. He said he had been seeking justice and compensation,but to no avail. Because we are peasants and we are poor,no one is willing to help us, the author wrote in the entry,which was the latest one in the blog. The blog was removed within hours,and it was not possible to verify its authenticity. Photos posted by CCTV on its microblog showed the area near the arrivals exit empty and filled with smoke. One photo showed medical staff and police officers gathering at one spot,with a wheelchair sitting on its side a few steps away. Terminal 3 was opened in 2008 just ahead of the Beijing Olympics.