An 18-year-old man is in hospital after being assaulted with a glass bottle.
Police officers were called to reports of a disorder involving three people outside the Mini Market in Kingshill, Swindon, shortly after 12:30 BST on Tuesday.
The man suffered injuries to his hand and shoulder.
Det Insp Rachel Hardy, from Wiltshire Police, said: "We are assessing CCTV from the area and would like to speak to any witnesses."
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