The explosion at Beijing Capital International Airport occurred in the arrivals hall of Terminal 3 shortly before 6:30pm local time, reports the South China Morning Post, citing social media.
Apparent eyewitness photographs of the aftermath of an explosion have been posted on the Chinese social networking site Weibo, but they have not been verified.
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The child died on her injuries and another 14-year-old girl was injured after the buggy they were travelling in was involved in a car crash.
Cloud thickening from the west throughout the day. Rain in northwest later.
The Songs of Praise presenter has voluntarily agreed not to appear on BBC whilst an investigation takes place.