JERSEY CITY, N.J. (AP) — Authorities say a man stabbed and injured a woman and two young children inside their northern New Jersey apartment before killing himself with the knife. Jersey City police responded to the apartment shortly after 7 a.m. Monday and found the 54-year-old man with a knife wound to his throat. He was pronounced dead a short time later. A 29-year-old woman and 7-year-old boy both had puncture wounds to the neck, while a 2-year-old girl suffered a neck laceration. All three were treated at a hospital, and their injuries are not considered life-threatening. A motive for the attack has not been disclosed.