A man has been arrested for killing his friend during an argument over money at a park in south-east Delhi Govindpuri, the police said on Saturday. They said the accused had stabbed the victim thrice. The incident happened at a park at Transit Camp near Tughlaqabad where the victim, Shivam was drinking with his friends Bunty and Aslam. While they were leaving, Shivam was confronted by accused, Azim, who demanded the money that he had lent the victim. An argument ensued. Azim then pulled out a knife and stabbed Shivam on the chest and abdomen and fled.