Gurgaon: Four persons have been arrested for killing a 21-year-old youth over Rs 500 here, police said Monday. The victim, Amrit, was assaulted and strangled to death by four of his friends on Gurgaon-Pataudi Road on Saturday night, police said.

During investigation, it was found that Amrit, a couple of months ago, had borrowed Rs 500 from one Puneet. "Puneet along with his friends Aman, Sahil visited Amrit at his residence and demanded the loaned sum. When Puneet failed to return the money, they took him outside," DCP (Crime) Rajbir Deshwal said.