A 15- year-old boy was kidnapped and subsequently stabbed to death in South East Delhi’s Sangam Vihar on Tuesday. The victim has been identified as Shivam. He lived with his family in the A- 1 block of Sangam Vihar. On Monday, he went out on his bike when he was intercepted by three juveniles at gunpoint. He was later taken to an isolated spot where he was stabbed. Police have started a probe to nab the accused.