A man has been taken to hospital with life threatening injuries after being stabbed in Harlow.
It happened in Third Avenue just after midday on Monday 22 July.
The victim, who is in his 20s, was attacked by three men.
Police believe this was a targeted attack - and are trying to trace a man who was seen having an argument with one of the attackers shortly before the incident.
Investigating officer Detective Sergeant Michael Orr, of Harlow CID, said: “We believe that this is a targeted attack and following some quick actions, we were able to secure the scene and get detailed witness statements. “We would like to locate the people responsible for this attack and another man who ran from off after getting involved in a fight with these men.
“We would like to hear from anyone who has information or dash cam footage as we carrying out our enquires."