ABC News Turn on desktop notifications for breaking stories about interest? OffOn Two people were killed and four were injured over the weekend. тАв 5 min read String of subway stabbings hits NYC The NYPD is stepping up patrols after two people were killed and two others injured. Dakota Santiago/The New York Times via Redux Advocates for homeless people have raised concerns about the move to deploy more than 600 New York City uniformed police officers to patrol the subway system in the wake of deadly stabbings. Two people were killed and four were injured in a rash of stabbing attacks over the weekend. All of the victims appeared to be homeless.