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A 15-year-old boy has been arrested after a teenager was seriously injured in a "one-punch" attack, police have said.

Officers were called to reports of an argument between two boys in a park in Wellington Road, Boston, at about 14:00 BST on Sunday.

Police said the 15-year-old was arrested on suspicion of grievous bodily harm (GBH) and has been released on bail.

On Monday, Lincolnshire Police said the victim was treated at the scene before being taken to hospital, where his condition was described as serious.

The force said it is not looking for anyone else in connection with the incident and its investigation continues.

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