Overview

• On July 23 at around 10:45 p.m., a 16-year-old was attacked and slashed in the lobby of Waterline Square, a luxury Upper West Side apartment complex.
• The teenager sustained wounds to his back, left shoulder and wrist and was taken to Mount Sinai Morningside Hospital in stable condition.
• Police recovered a knife at the scene and are processing evidence, including fingerprints and security footage.
• Authorities say the four male assailants fled on foot without arrest and have circulated suspect descriptions while urging public tips.
• Residents have reported prior youth disturbances at the building, raising questions over security measures at the high-end development.