Police say the 19-year-old was assaulted by another man in the city at around 2am
An 18-year-old man has been arrested on suspicion of murder following the death of a man in Derry overnight.
Police said a 19-year-old Jordan McConomy died after an altercation at around 2am this morning in the William Street area of the city.
Mr McConomy, who was from the Rossnagalliagh area was seriously injured during the alleged assault and was taken to hospital.
He died from his injuries a short time later.
The 18-year-old was arrested this afternoon and is currently in custody at Strand Road PSNI station.
Police in the North are appealing for witnesses to come forward.
Detective Chief Inspector Geoff Boyce of the PSNI Serious Crime Branch said police believe the victim “was in an altercation with another male and was seriously injured during an assault.”
“Police are aware that many people were socialising in William Street earlier this morning and we would like to hear from members of the public who witnessed an altercation in William Street between approximately 1:45am and 2:15am to get in touch with detectives at Strand Road.
The PSNI has also urged motorists who were in the area and may have captured the incident on a dash cam to come forward