CCTV images of four men wanted for questioning in connection with an assault have been released by Cambridgeshire Police.
Officers were called to Brooks Road, St Neots, at about 7.30pm on Saturday, 7 September, with reports a man had been assaulted.
He later attended Hinchingbrooke Hospital, in Huntingdon, suffering from serious injuries.
Anyone who recognises any of the men in the images should report it through the force website using reference 35/66048/24.
Anyone without internet access should call 101.