This is in China.
“On September 30 at 10:00 pm, a random stabbing incident occurred at Walmart on Miaoqian Road in Shanghai's Songjiang District.
On October 1, police reported that the killer, Lin, came to Shanghai to express his anger over personal financial disputes. As a result, "In the incident, 18 were injured, three of whom died after rescue efforts failed, including a small child."