An 18-year-old man arrested on suspicion of attempted murder following a stabbing in Cambridge Road, Eastbourne, on Thursday afternoon (3 October) has been released on conditional police bail until 31 October.
A 16-year-old girl also arrested on suspicion of attempted murder in connection with the same incident has been released under investigation.
The victim in the incident, an 18-year-old local man, continues to receive medical treatment for his injuries.
An appeal for witnesses to the stabbing continues, and anyone with information is asked to contact Sussex Police online or by phoning 101, quoting Operation Redvale.
Alternatively it is possible to contact the independent charity Crimestoppers anonymously on 0800 555 111.