Detectives are investigating a violent Australia Day attack which left a man with a broken arm and serious nerve damage.

Police said the 21-year-old was walking along Roe Highway with a friend around 9.50pm when two motorcyclists abused him as they drove past.

After crossing the highway, the man spotted one of the riders a short time later and began running away.

Police said the rider pursued the victim and began yelling, before trying to hit the 21-year-old in the head with a piece of timber.

The man lifted his arms to protect himself from several blows, before the rider got on his motorbike and drove off.

He suffered several deep lacerations, nerve damage and cracks to his arm-bone with required a plate and several screws to be put in his arm.

The offender is described as between 17-19 years of age, between 165-175cm tall with an olive complexion and curly hair.

He was wearing fawn coloured shorts, a red t-shirt, a red cap with a white emblem on the front, and was riding a red and white motocross bike with white handlebar protectors.

Anyone with information should call Crime Stoppers on 1800 333 000.

The West Australian

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