Essex Police were called shortly after 4.15pm today to reports of a collision involving a motorcycle and a pedal cycle at the Wake Arms Roundabout, High Road.
It is believed that the motorcycle was travelling from the Robin Hood roundabout towards the Wake Arms roundabout at the time of the collision.
The road is currently closed while police carry out investigative work.
Drivers are urged to avoid the area until further notice.
An Essex Police spokesman said: “If you have any information, dash cam or other footage in relation to this collision, then please get in contact with us.
“You can let us know by submitting a report on our website or by using our online Live Chat service available Monday to Friday (excluding public holidays) between 10am-9pm.
“Visit www.essex.police.uk/digital101 to find out more about our website reporting services.
“Alternatively, you can call us on 101 In an emergency always call 999.
“If you would like to make an anonymous report, you can contact independent charity on Twitter at @CrimestoppersUK, by visiting their website or by calling 0800 555 111.
Please quote incident 824 of April 16 when providing any information to police make sure it gets to the right person as quickly as possible.