CHENNAI: On Diwali day, four people were hacked to death in two incidents at Kannagi Nagar and Vyasarpadi. In a clash which broke out over long-standing enmity, three people were murdered and two others were injured at Kannagi Nagar on Saturday night. In the other incident, a 29-year-old history sheeter was hacked to death near the Vyasarpadi Jeeva railway station on Saturday night by a gang over previous enmity.At Kannagi Nagar, a five-member gang attacked the four people on a street, just 500 metres away from the police station. The deceased were identified as S Kalia alias Raj alias Ranjith Kumar, 22, T Sebastian alias Miller, 20, and Shaktivel, 22.All the murdered were residents of Kannagi Nagar. Sengotian, 21, is undergoing treatment in the Rajiv Gandhi Government General Hospital.Preliminary enquiries reveal that there was enmity brewing between the two groups over establishing supremacy and selling ganja. The reason for Saturday's murder could be a fallout of both.On Saturday evening, the victims along with two of their friends were chatting near the councillor's officer, when a five-member gang headed by V Datsha alias Tamil Arasan, 20, got into an argument with them. Police sources said there was already a minor tussle between the gangs in the afternoon. Even as the wordy duel was on, one of the gang members pulled out a knife and attacked Sebastian. While trying to get away from their clutches, he fell into a drain. The gang dropped a huge stone on him. Ranjith, who was attacked with sickles, died on the spot.Hearing their cries locals residents reached the spot, but the gang escaped. They took the injured to the general hospital, where Sebastian died on Sunday morning and Shakthivel, in the evening. The body of Ranjith was sent to the Royapettah Government Hospital for autopsy. Sebistian worked as a painter and is survived by his wife and a two-month-old daughter. Ranjith is a daily wage labourer and is survived by his parents and two elder brothers.The police have arrested V Jobita Mani alias Manimaran, 23, V Datsha alias Tamil Arasan, 20 and A Tilana alias Arupataraj, 23, of the same locality.The Vysarpadi attack victim was identified as C Palani of BV Colony. Police said the murder was planned by Thoppa Ganesh and Arivazhagan of B V Colony to settle scores over a previous enmity. Palani came out of his house when he received a call. He was near the railway station when the gang attacked him. Palani was an accused in the murder of one Muthu Batcha of BV Colony in 2013. He is also a suspect in the murder of Saravanan of Puzhal in 2014.