Two stabbed dead, including a foreigner in Beijing.[Photo/weibo.com]

A man stabbed dead two pedestrians, including a foreigner, this afternoon at the Chaoyang Joy City in Beijing , said local police.

Police have detained the knife assailant. The incident took place about 5pm today, police said.

An initial investigation showed the man suffered mental disorder.

More details of the violence are still being investigated.

The shopping mall is located in the city's downtown Chaoyang District.