As per another popular tradition, in the Dwapara Yuga Period, Vishnu as incarnation of Krishna killed the Demon Narakasura, who was evil king of Pragjyotishapura, near present-day Assam and released 16000 girls captivated by Narakasura. Diwali was celebrated as a significance of triumph of good over evil after Krishna's Victory over Narakasura. The day before Diwali is remembered as Naraka Chaturdasi, the day on which Narakasura was killed by Krishna.