UNION SQUARE, Manhattan (WABC) -- A man pushed a woman onto subway tracks at the 14th-Street Union Square station in Manhattan Thursday morning and ran away.It happened around 10:30 a.m. on the 4/5 train northbound platform.Officials said 29-year-old victim was helped back onto the platform by fellow riders and suffered minor injuries.She was rushed to a waiting ambulance and transported to Bellevue Hospital.It was unclear what -- if anything -- prompted the incident, but it was described as a deliberate and apparently random act.The unknown suspect fled the scene.Police described him as a heavyset black man who was wearing a black jacket with a gray hoodie underneath, dark pants and dark shoes.Anyone with information is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).----------