China has "lodged representations" to North Korea after a North Korean army deserter killed four Chinese citizens during a robbery in the border city of Helong Nike Air Vapormax Flyknit , Yanbian Korean Autonomous Prefecture in Jilin Province.
Chinese foreign ministry spokeswoman Hua Chunying said on Monday that China's public security ministry is investigating the case.
The North Korean army deserter crossed the border into China on December 27, 2014. He allegedly stole money and food from a village before killing four residents, according to reports by South Korea's Yonhap News Agency and Dong-A Ilbo newspaper.
Sources said that the soldier has been detained just north of the Tumen River, a boundary river between China and North Korea.
China's Ministry of Public Security declined to comment on the case, saying "the information is sensitive."
According to the Dong-A Ilbo newspaper, the victims were two elderly ethnic Korean couples. Nearly 30 percent of the population in Yanbian is of Korean ethnicity.
Lü Chao Nike Air Vapormax , an expert at the Liaoning Academy of Social Sciences, told the Global Times that armed robberies by North Koreans have happened many times in the area and have victimized both guards on patrol and local residents.
"Local villagers have taken measures to protect themselves," Lü said, adding that the number of such incidents has been declining, and that killings such as the one in Nanping are quite rare compared to robberies over the past 10 years.
According to The Beijing News, the township of Nanping in Helong Cheap Air Vapormax , where the killing took place, has witnessed some 20 villagers killed by armed North Koreans. The report did not specify a time frame.
Over 70 percent of the population in Nanping is Korean-ethnic.
Jin Qiangyi, director of the Asia Studies Center at Yanbian University, said hunger and poverty are the main factors driving North Koreans across the border.
"These people are not real defectors, who will pass into China quietly and keep a low profile. The