A 25-year-old woman was allegedly raped and brutally beaten up by four men in Gurgaon, resulting in severe head injuries, in the early hours of Sunday, the police said. All the accused, aged between 20 and 25, were arrested within hours of the crime, they said. Police said the accused met the woman on Saturday night near Sikanderpur metro station in Gurgaon and took her to a realtor's office, where the crime took place.