A man was pushed and then punched in an unprovoked attack in a supermarket.
The assault happened in Tesco in St Peters Street, St Albans, at 6.15pm on Tuesday, when a man in his 60s was shoved by another man and punched to the face, causing him to fall to the floor.
The victim suffered bruising in the attack, which police say was unprovoked.
Police believe the man pictured may have information that could assist their investigation.
Anyone who recognises the man is asked to contact PC Rishi Patel at rishi.patel@herts.pnn.police.uk, call non-emergency number 101 or report information online at www.herts.police.uk/Report.
People can also contact the independent crime-fighting charity Crimestoppers anonymously on 0800 555 111 or at www.crimestoppers-uk.org.
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