It comes after officers were called to Ongar Road shortly before 2.15am on April 20 with reports of an incident.
An investigation was launched when a man in his 20s was discovered injured at the scene after being punched to the floor and kicked.
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Detectives are looking to identify three men as part of their enquiries.
Anyone with information, CCTV, dash cam or other footage connected to the incident should contact Essex Police with reference number 42/53080/25.
Anonymous reports can be made to the independent charity Crimestoppers by calling 0800 555 111.
