Brent Police are appealing for witnesses after a man was viciously attacked in Kensal Rise after the Notting Hall Carnival on Monday.
The victim sustained a head injury after he was punched in the face which caused him to fall to the floor in Chamberlayne Road.
Officers patrolling the area detained a man who was arrested on suspected grievous bodily harm.
He has been bailed to return to a police station at a later date.
Anyone who witnessed the attack at around 8.40pm should call Brent Police on 020 8733 3736 or call Crimestoppers anonymously on 0800 555 111.
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