Rowdy Inverness-bound passengers danced on tables
A group of up to seven men chanted, swore and danced on tables on a train travelling from Glasgow to Inverness, police have said.
The men were believed to have been returning home from a Scottish Premier League match on the 18:11 service on 22 December.
British Transport Police said other passengers were moved to different carriages to avoid the disturbance.
The force has appealed for witnesses to the incident.
PC Nick Ritchie, the investigating officer, said: "A group of around six to seven men, who are believed to have been returning from a Scottish Premier League game, began chanting, swearing and dancing on tables.
"The men were spoken to repeatedly by the conductor of the train about their behaviour, who was required to move other passengers away from the group."
The officer added: "The men's behaviour was entirely inappropriate and caused a disturbance to others."
Ross County were playing away to Celtic in the SPL on the weekend before Christmas.