Police are appealing for witnesses after a 19-year-old boy was assaulted in Maidenhead town centre.
The victim and his 14-year-old brother were walking along the High Street after they had left the Odeon cinema in King Street on Friday.
They were reported to have been approached by a group of people near the White Horse Pub.
One of the men in the group punched the victim in the face, causing him to fall to the ground.
The man and four others then ran off past the Recharge cafe and down an underpass heading towards Grenfell Park.
The victim suffered swelling to his face and a split to his eyebrow, which required stitches.
He was treated for his injuries at Wexham Park Hospital in Slough.
Designated investigator Sarah Bradshaw, of Maidenhead CID, is appealing for witnesses to come forward.
She said: "As the incident happened between 8.30pm and 9pm on a Friday evening, the area would have been busy and there would have been people who would have seen the group in the area prior to the assault and running away following the incident."
The offender is described as white, about 17 to 18-years-old, 5ft 8ins to 5ft 9ins, of slim build with brown hair.
He had a few spots and no facial hair.
He was wearing a dark grey hooded coat or tracksuit top with the hood up and a grey wool hat underneath, as well as grey tracksuit bottoms.
Contact police on 101 or call Crimestoppers anonymously on 0800 555111.
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