A man’s ear lobe was maimed in a fight near The Level in Brighton last night.
The 20-year-old was one of four people involved in the fight, Sussex Police detectives believe.
They arrested a boy of 17 on suspicion of assault causing grievous bodily harm (GBH) shortly after the incident in Rose Hill, Brighton.
Detective Constable Ariana Brotherhood said: “This was a nasty attack on a young man which has left him with a maimed ear lobe.”
Officers were called about the fight shortly after 8.30pm and circulated a description of the boy believed to have attacked the 20-year-old.
She added: “We are pleased that the suspect was quickly arrested.”
The local boy was in custody being questioned this afternoon.
Anyone with information about the incident is asked to call Sussex Police on 0845 6070999.