A 56-year-old woman was stabbed and left hospitalized in an attack by a 66-year-old woman at a ritzy co-op apartment building on the Upper East Side on Saturday, according to sources. The brazen attack reportedly happened at 210 E. 73rd St., which sits between Second and Third Avenues in the upscale nabe. A real estate photograph shows 210 E. 73rd Street on Manhattan’s Upper East Side, where a woman was stabbed. The doorman of the building told The Post that the incident happened sometime around 12:30 p.m. The post Woman, 66, allegedly stabs another woman at exclusive Upper East Side apartment building appeared first on New York Post.