Three men arrested for an assault and stabbing in Clacton on Thursday have been released on bail.
Essex Police say they are reviewing CCTV evidence as well as speaking to more witnesses.
It is now believed that there was an earlier fight in Station Road which happened before the stabbing.
Police are keen to hear from several people who have not yet come forward, but who are important witnesses.
Contact detectives at Clacton on 101, or leave information anonymously at Crimestoppers on 0800 555 111.