Witnesses reported the man was yelling and waving the explosive device for a while without security responding.
Via RT:
A man in a wheelchair was responsible for an explosion that rocked Beijing Capital International Airport, Chinese media said. He allegedly attempted to blow himself up to protest a brutal police beating that left him disabled, Twitter reports claimed.
The suspect behind the blast in the arrivals hall of terminal three of the Beijing airport has been identified as 34-year-old Ji Zhongxing from Shangdong, CCTVNews reported. The Sina Weibo microblog of state broadcaster China Central Television said a man detonated a package of black gunpowder used to make firecrackers just outside the international arrivals exit.
Local media quoted by the South China Morning Post said the man was rushed to hospital. His condition remains unknown.