A 15-year-old has been arrested on suspicion of assault and possession of an offensive weapon following disorder in Wolverhampton City Centre.
Two people were injured during the trouble, which happened in the Lichfield Street area on Saturday night (19 April) at around 8:10pm.
The teenager was questioned and released on police bail pending further enquiries.
A young woman was assaulted and was taken to hospital with back and leg injuries.
A 15-year-old boy was also taken to hospital for a knife wound.
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"She tried to take hold of the knife to stop him. He told her not to shout out and scream and get on her knees and beg."