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Police in Wisbech are warning us not to approach wanted man Lewis Marsh (pictured right).
Officers want to speak to him about a serious assault in Murrow on January 31 - we do not have any more details at the moment.
20 year old Lewis Marsh is described as white, six foot, slim and short cropped dark hair.
Detective Sergeant Matt Swash said: "Work is ongoing to trace Lewis Marsh and we are following up a number of lines of inquiry.
"Our aim is of course to trace Mr Marsh as quickly as possible and I would urge anyone with information regarding his whereabouts to contact police immediately."
Members of the public are urged not to approach Lewis Marsh should they see him, but to report sightings to police.
Anyone with information should contact Det Sgt Swash on 0345 456 456 4 or Crimestoppers, anonymously, on 0800 555 111.