A man will appear in court after a stag party caused chaos in The Plaza, Palmerston North.

A man has been arrested over a fracas where a shopping centre security guard was hit with a sex toy during a stag do.

The alleged assault took place on Saturday in Palmerston North, when the stag party – which featured a man wearing a unicorn onesie – descended on The Plaza.

A police spokeswoman said a security guard was "poked" and hit with a dildo, before being punched in the face as they led the party from the shopping centre.

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Police confirmed on Tuesday a man had been arrested in relation to the party, but could not give information about what charges the man may face.

The man will appear in the Palmerston North District Court at a later date.