A 17-year-old boy has been arrested after a man suffered a cut to the neck on the Whitehouse estate in Ipswich.
Suffolk police received reports of two men, one carrying a knife, off Norwich Road at around 12.40pm on Wednesday.
They were seen in Meredith Road, near the Aldi supermarket and opposite Whitehouse Park.
Police later discovered a man had suffered a cut to the neck, but he refused treatment at the scene.
A 17-year-old boy was subsequently arrested on suspicion of causing grievous bodily harm a short while later.
He has been taken into custody for questioning, where he remains.
A large emergency services presence, including police, ambulances and an air ambulance, were reportedly seen in the estate on Wednesday afternoon.
A woman working in a nearby store, who asked not to be named, said: "I heard some shouting, so I looked out of the window. On the corner, by Aldi, there were two boys shouting at each other.
"They started jumping around like they were in a boxing ring.
"I didn't see much after that because they went behind Aldi. But then they came running back. One disappeared, the other came back with his T-shirt off, holding the back of his neck.
"The next thing I know there's police everywhere."
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