A man has died after being admitted to hospital with head injuries.
The 40-year-old was reported to have been assaulted in Southend Road, Grays, at around 12am on Monday November 30.
He died on Tuesday December 1.
A 26-year-old man from the town was arrested on suspicion of causing grievous bodily harm and has been released on bail until December 21.
Police believe that there were two other people present when the assault took place, and urge them to come forward.
Officers are also keen to identify any drivers who may have witnessed the altercation, or who may have dashcam footage.
If you were on the roundabout that meets on Southend Road, Chadwell Road and College Avenue between 11.45pm on Sunday November 29 and 12:25am on Monday November 30, you may be an important witness, so please get in touch.
If you can any information, please email: [email protected]
You can also report online by going to https://www.essex.police.uk and use the ‘Live Chat’ button to speak to an online operator between 7am-11pm.
Information can also be given to independent charity Crimestoppers anonymously on 0800 555 111 or https://crimestoppers-uk.org