NELLORE: In a tragic road accident, six persons, including two couples, were killed and eight others suffered injuries. The accident occurred when a speeding lorry hit the tractor in which the villagers were travelling on the Naidupeta-Tirupati road on Thursday night. According to the police, those who lost their lives have been identified as C.Manaiah (45) and his wife Chittemma (40), A.Chenchuramaiah (55) and his wife A.Polamma (50), A.Ramanaiah (45) and A.Kanthamma (25), all residents of Ajaram village of Chittoor.