A 17-year-old boy was headbutted in the face while walking with a friend in Didcot, police have said.
The friends were walking across Cow Lane Bridge at about 9pm on Thursday night when they were approached by two men.
Thames Valley Police said one of the men headbutted the 17-year-old in the face, for which he received treatment at Abingdon Community Hospital.
Police appealed for anyone with any information about the attack to call 101.
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