Officers would like to speak to Bryn Jones, 39, about an assault in Malvern on 16 August outside the One Stop shop on Pickersleigh Road around 6.55pm.
They believe he could help with enquiries.
The victim of this incident walked out of the store to be confronted by a group of five men and was threatened by a knife.
The group then proceeded to assault him after he had fallen over and the victim received kicks to the head and body.
Mr Jones has links to Malvern and Worcester.
If you know this man or have any information, please contact PC Neal by email 22-NeighbourhoodCrimeFightingTeam-SouthWorcestershire@westmercia.police.uk or by calling 07971395115
Alternatively, if you have information but don’t feel comfortable speaking to police, you can speak to the independent charity Crimestoppers.
It is 100% anonymous, they never ask your name and they cannot trace your call or I.P address.
You can contact them online or by calling 0800 555 111.