A 24-year-old woman was allegedly gang-raped by three men at knifepoint in Tamil Nadu's Vellore on Saturday. The incident took place at around 7 pm in a park next to the 16th century Vellore Fort in the heart of Vellore, around 140 km from capital Chennai. According to the police, the men also assaulted the woman's boyfriend and robbed them of their belongings.