Jonathan Kaiman “North Korean soldier shot by Chinese army after reported killing spree” http://www.theguardian.com/world/2015/jan/05/north-korean-soldier-shot-by-chinese-army-after-killing-spree
Yonhap “(LEAD) N. Korean army deserter kills 4 Chinese in border town: source “ http://english.yonhapnews.co.kr/national/2015/01/05/94/0301000000AEN20150105003800315F.html
It is not uncommon for North Korean soldiers or citizens to cross the border into Chinese towns and attempt robberies.
In December 2013, a North Korean defector in his 20s killed an elderly Chinese couple in the Chinese border city of Yanji and stole 20,000 yuan (US$3,210). The North Korean defector was caught by Chinese authorities after fleeing to Beijing.