Avinash Kumar had gone to a market along with a minor friend yesterday evening when an acquaintance called him to a park. He was stabbed when he reached the park in Dwarka Sector 1, said a police officer.
His minor friend was also thrashed by the accused.
An injured Avinash was taken to his home by his minor friend and was later rushed to a hospital by his family members. He was declared dead by the doctors of the hospital.
A case has been registered and investigation has been undertaken, police said.