A 20-year-old man was left needed stitches after being assaulted outside a Mexborough pub.
The assault took place outside the Boy and Barrel pub on High Street in the early hours of Sunday, April 21.
Police have released this CCTV image of a man they believe holds vital information.
He is described as white, with dark-brown, short hair.
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Anyone who recognises him should contact South Yorkshire Police on 101 quoting incident number 899 of 21 April, 2013, or ring Crimestoppers on 0800 555111.
