New Delhi, Dec. 9 -- A 22-year-old man was stabbed to death allegedly by a known person in Shakarpur in east Delhi on Sunday evening, police said on Monday. The deceased, identified as Dev Kumar of Shakarpur Khas, was stabbed multiple times in the thigh, police said. Kumar's relatives told the police that while being taken to the hospital in an ambulance, he tried to indicate that he had been attacked by someone from his neighbourhood. Police are probing the role of a local resident who had previously been involved in murder and attempt-to-murder cases. The suspect was a minor at the time of those earlier incidents and may still be under 18. A case of murder has been registered at the Shakarpur police station. In another incident, a 19-year-old man was killed and two others injured after they were allegedly stabbed by a group in JJ Colony, Madanpur Khadar, on Sunday evening, police said. The victims were taken to a private hospital where Vikas, 19, was declared brought dead, while the other two are undergoing treatment and are stated to be stable....