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
Labour leader will put support for public ownership at the centre of the party's campaign for May's local elections in England.
Scientists are researching a blood test which can quickly detect colon, lung, breast, stomach and endometrial cancer.
Transport bosses are said to be in "active discussions" with the company to encourage it to extend its pilot scheme to the UK's capital.