A one-and-half-year-old girl was attacked and killed by a leopard in the forested area of Aarey colony in the western suburb of Goregaon here on Monday, police said.The incident took place in unit number 15 of Aarey around -- A one-and-half-year-old girl was attacked and killed by a leopard in the forested area of Aarey colony in the western suburb of Goregaon here on Monday, police said.