A man posed as a delivery driver to charge into a house with a group and steal a wallet and jewellery.
The incident happened around the Merry Hill area in Bushey, at around 9pm on May 15, when a man came to a house pretending to deliver a package.
Once at the door, he and two other men pushed their way into the house and assaulted the homeowner.
The men then made off with a wallet and jewellery.
Police have released CCTV images of three men they would like to identify and talk to following the robbery.
Another angle of one of the men police would like to speak to.
It is believed the men in the images were in the area at the time of the incident and could assist with the investigation.
You can report information online at herts.police.uk/report, through online web chat at herts.polilce.uk/contact, or calling the non-emergency number 101 quoting reference 41/38145/20.
Alternatively, you can call Crimestoppers anonymously on 0800 555 111 or report information online at crimestoppers-uk.org.
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