In the afternoon, the police were informed that a teenager was declared "brought dead" by the doctors at a hospital after being attacked with a broken glass bottle.
The deceased, Shahrukh, was a resident of Kabir Nagar.
The deceased and the accused were said to be addicted to inhaling whitener. The two used to frequently fight with each other over sharing the substance, the police said.
The accused, also a resident of the same area, told the police that as Shahrukh had refused to share the whitener with him, he decided to confront him.
Another man, Dinesh Chegi, was also present when the altercation between the accused and the deceased took place and all three were sitting by the Kabir Nagar railway tracks, the police said.
Meanwhile, the deceased's mother was informed of the scuffle between her son and the accused. She reached the spot and saw Shahrukh collapse after the accused slit his neck with a broken glass bottle, the officer said. The accused, along with Chegi, fled the scene immediately.
With the help of the locals, she rushed her son to a hospital, where he was declared "brought dead" by the doctors.
A case was registered on a complaint by the deceased's mother, the police said, adding that subsequently, Dinesh was arrested and the juvenile accused apprehended.
Shahrukh's body was sent for a post-mortem, the police said.
Get Breaking news, live coverage, and Latest News from India and around the world on NDTV.com. Catch all the Live TV action on NDTV 24x7 and NDTV India. Like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.