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.
More top news
In the unexpected announcement on Monday, Mr Key said it was the "right time" to leave politics.
As the Government's Brexit appeal comes to the Supreme Court, here's a look at what you need to know.
According to local reports, the man was found by friends in their accommodation in Val Thorens resort in the Alps on Sunday morning.