A 35-year-old man was hacked to death by a gang of six unidentified men at Wimco Nagar in Tiruvottiyur on Thursday. The victim was identified as V. Kamaraj, 35, whose father Vivekanandan is a local DMK functionary. Both father and son were public contractors and had an office on the ground floor of their house in Poompuhar Nagar. Police sources said when Kamaraj came to the office on Thursday, six men, who came on bikes, barged in and attacked him with weapons. Upon hearing the commotion, neighbours rushed to his office and the suspects fled the scene. Kamaraj was rushed to a nearby private hospital, where he succumbed to injuries. The police have launched an investigation to trace the suspects.