A 17-year-old was left with cuts to his face after being attacked outside Booze Buster in Burnley Road, Accrington.
The teenager was punched in the face by an unknown man at around 5.40pm on Wednesday. His attacker then ran off, leaving his victim with a cut lip and a graze along his cheek.
The assault was so quick that the victim was unable to give police a description of the other man.
Anyone with information about the incident is asked to contact Accrington Police on 01254 51212.
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