KOLKATA: A 26-year-old youth was stabbed to death at Tangra on Sunday.Locals found the body lying beside the railway tracks at Tangra on Monday morning and informed the police. Police sent the body for an autopsy and initiated a probe in this connection. Though the investigating officers are yet to ascertain the exact reason behind the murder, they are suspecting that the crime is an outcome of an old rivalry. There were deep injury marks on the victim’s body and head. Also Read – Heavy rain hits traffic, flightsPolice are suspecting that someone “very close” to the victim, Sunny, is behind the murder. After preliminary investigation, they are suspecting that the victim had trouble with one of his friends on Saturday night when they had assembled near the railway tracks.Sunny often used to meet some of his friends at the spot and he went to the same place on Saturday night as well. Police are now trying to ascertain what led to the heated altercation between Sunny and one of his friends. The investigating officers Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedare going through the footages of the CCTV cameras in the area.Meanwhile, police have arrested one person in connection with the murder of another youth at Tangra on Sunday. The victim, Babu Sarkar, was stabbed to death on late Friday night. Acting on a tip off, police conducted a raid and arrested one Joydeb Halder in connection with the murder.It may be recalled that Babu was attacked when he was returning home on Friday night. He was declared brought dead when taken to NRS Medical College and Hospital.Police have come to know about two more persons who are also suspected to be involved in the murder. Preliminary investigation further revealed that a business rivalry had led to the crime. He was also involved in to the business of real estate development. Police are, however, trying to find out if there is any other reason behind the murder.