Police are releasing an E-fit image of a man they would like to speak with in connection with a burglary in Hemel Hempstead.
The incident occurred in Claymore between 9am and 10.30am when the offender gained access to the property through an open window.
He was disturbed by the victim and ran from the scene out of the back of the property taking items of jewellery.
The offender was wearing a black beanie hat and black jacket.
DC Richard Bagworth is investigating and said: “I would appeal to anyone who recognises the man shown in the E-fit to please contact police.
“I am also keen to hear from anyone who saw anything suspicious in the area that morning or who saw a man running from the scene.”
Anyone who was in the area and saw anyone acting suspiciously or who has any information which could assist the investigation should please call the Herts Police non-emergency number 101 quoting crime reference number D1/17/1218.
Alternatively, you can contact the independent crime-fighting charity Crimestoppers anonymously on 0800 555 111 or through their Anonymous Online Form at www.crimestoppers-uk.org. No personal details are taken, information cannot be traced or recorded and you will never need to go to court.