The incident took place in Ghazipur yesterday in which the deceased has been identified as Shahrukh, a Ghaziabad resident.
Shahrukh had come to the locality with his father.
Incidentally, the 15-year-old boy, who attacked Shahrukh, was earlier sacked by the victim's father.
Shahrukh was having tea when the teenager entered into an argument and stabbed him.
The teenager was apprehended by eye-witnesses who handed him over to police.