Emergency services have been spotted at the scene of a crash on a busy junction in Colchester.
Police are responding to a collision reportedly involving two cars on the Harwich Road roundabout.
One of the vehicles has been described as a black Mercedes.
The accident is partially blocking the road on the approach from Ipswich Road and St Andrews Avenue.
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Traffic is building up in the surrounding areas, according to AA Traffic Maps.
Drivers are advised to find alternative routes, or to allow for additional time if commuting through the area, to prevent delaying their journey.
Essex Police have been contacted for a comment on the incident.