Police have identified more than 20 youths who they believe were involved in a disturbance at Dundee railway station.
The incident took place at about 17:45 on Friday.
Police Scotland said 23 people aged between 14 and 17 from Dundee, Perth and Invergowrie had been identified.
A police spokesman said: "A number have already been charged for their involvement and those who haven't yet will be in due course."
A man was treated for a head injury following the incident.