Shae Gordon of Enfield has died in hospital after a disturbance in Lichfield Road, Bow, east London, just after midnight on Sunday.
It is believed that a number of people were caught up in the incident but not all were directly involved or armed with weapons.
An eighteen-year-old man has been arrested on suspicion of violent disorder, while a second teenager remains in a critical condition in hospital.
Detectives carried out door to door inquiries. Officers were also examining CCTV while the investigation into the stabbing of the seventeen-year-old is continuing.
Anyone who witnessed this incident, or who has captured footage or images, is asked to call the major incident room on 0208 345 3715, giving the reference Operation Wildcast.
Information can also be given to Crimestoppers anonymously on 0800 555 111.