A police officer and several onlookers were injured when a man threw a firework into a crowd watching Aberdeen's Hogmanay street party.
Grampian Police said the man threw the firework just minutes after midnight, as revellers watched the celebrations at the city's Castlegate.
Police said they were investigating the incident.
A 27-year-old man has been arrested and is in custody. He is expected to appear at Aberdeen Sheriff court on Saturday.
Meanwhile, Grampian Police said they were pleased that the Hogmanay street party attracted a sizeable crowd and that "the vast majority entered into the spirit of the occasion and behaved very well".
Superintendent Adrian Watson said: "I am delighted that the event was so well attended and those that came along enjoyed such a great entertainment line-up."
He said there were relatively few arrests, mainly for alcohol-related public disorder.